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Technique parameter 1.Frequency band:910A (UHF band),910B(ISM band short antenna)band fixed frequency point,using soft antenna to rod antenna to receive. 2.Transmission distance:2000m(max 5000m)in widen area,which is according to its using conditions. 3.Power supply:the transceivers use high energy Lithium batteries witch can be used for 36 hours to monitos and 16 hours to transmit in total. 4.Sensitivty (all directions )of sound picking up is better than 12db .Differentiate rate is high within 100 square meters .Impedance of audio input circuitry is low. 5.The jack (3.5mm) of the monitor head can be input all kinds of audio signals,such as monitoring audio frequency and MP3 output,and so on. 6.The input signal cab ve regulated for a loud and discortionless sound ,it can use the MP3 as a signal source to test which the provided connecting wire. 7.You can insert a three-way plug to the earphone hole ,thus ,you can connect the sound pickup to the recorder to record the content you heard at the same time as you hearing. attention: * Usedtoautomaticallypoweroffafter thecharge togreencontinuedstorage ofadditionalpowercanchargethe maximuml-hourand extendedbattery life.External powercharger foruse must beinfullchargestate (when thegreen lightoff) for, ifyouhuminterferencefrom thepullreceiverwill reduceor disappear.Pleasedo not uselongenoughto addelectricpowerto save andonceevery two months.Non-covered boxorKaicould damage the product.Transceivermust be matchedwith(packagemay be differentbetween thetransceiverfrequency). Learn More

Specifications: Working Radius: 15 meters Signal Power: 1200mW Power Supply: can work via battery and two power adapters Battery Information: Lithium-ion 8.4V 6600mA Battery Working Time: 3.5 hours maximum Adapters Details: AC 110~250V to DC 12V, car 12V to DC 12V, both 2000mA Antennas Details: high-tech rubber (6 units) Dimensions Of Device: 127/250x75x34mm Weight Of Product: 800g Fully protected against: iPhone3,iPhone4/S,iPhone5/S/C iPhone6/S/Plus iPhone7/S iPad2/3/4 Air All Sumsung 3G 4G cellphone HTC cellphone Moto cellphone All other cellphones Note: 4G(LTE)725MHz - 770MHz / 4G(2300MHZ-2500MHZ) for USA 790MHz - 862MHz / 4G(2620MHZ-2680MHZ) for Europe we will choice correct model according your shipping address Learn More

Package Contents: 1 x Bluetooth Watcg 1 x A218 Earpiece 1 x AC Adapter (100~240V, 50/60Hz, 5V/200mA) 1 x Batteries Without Retail Box Learn More

Video format: AVI Video format: AVI Video Coding: M-JPEG Video Resolution: 1920*1080 Image proportion:4:3 Support up to 128GB TF card WIFI App : HDminicam Battery:3000Mah Playing Software: Operating system comes with or mainstream video player software Operating system: WinXP,Win2000,Windows Vista,Win7, Mac os, linux Learn More

How does it work? The new developed GSM BOX has a built-in dual band GSM module that works in both of Four Band mobile phone networks. Once insert a GSM SIM card and turn on the power, it will automatically pick up calls from any mobile phone or telephone. The powerful inductive coil will creat strong signals to drive earpieces within 30-50cm distance. One pc 35db top sensitive microphone ensures your partner hear the whisper voices, even the GSM BOX is hidden under the clothes. GSM BOX has a builtin rechargeable 650mAh battery. supports more than 2 hours talking time, or 48 hours Standby time. 3in1 GSM-ID-Card 85x50x4.5mm As a master card Only 30 grams IMEI Unique can work in any country Built-in induction 3-4h talking time what is included in tha packing for 1pc? 1 x vip pro GSM card box 1 x 808 earpiece 1 x original 337 battery Welcome bulk order, do not hesitate to contact us! Learn More

• Mini wireless earpiece consists of specialized chip, shell, faceplate, battery door, handle etc.
  1.Battery door: Open battery door by fingertip, install the battery perfectly and push the battery door to battery box.
  2.Handle: Clarity and high strength string help you to take out the earpiece from ear canal easily.

• Mini wireless earpiece  receives signal by inductive coil.  

• across electromagnetic fields  

• Receiving distance: 50-70 cm  

• Standard Zinc-air battery: type 337  

• Battery life: about 5-8 hours  

• Audio bandwidth: from 300 Hz to 4 KHz

• Distortion: <2%  

• Size: 3x5x7mm  

• Working frequency: all frequencies

• Distance between inductive coil and Mini wireless earpiece: about 70-100 cm

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Descriptions: This dictionary audio jammer support to blocks digital voice recorder,cell phone,video recorder,audio bug and other audio device which pick up voice. This audio jammer generate "zzz" noise to all the digital microphone, it will protect the conversation voice not be recorded or transmitted by any device. This audio jammer is quiet which do not generate any noise to human ear, easy to hidden in your office or meeting room. Charging: during charging trun green LED on, when charged full turn red LED on. This device support working during charging. Parameters: Blocks object: cellphone,digital voice recorder,video recorder,GSM listen device etc. Effective distance: 2 - 5 meters Effective angle: 90 - 120 degree Power On/Off: Remote control Product Dimension: 210mm*150mm*50mm Weight: 0.95kgbr /> Working Temperature: -40 - 55° Working Humidity: 35 – 85% Battery Capacity: 4000MAH/12V Package: PP protection case Power Adapter: AC 100V/240V to DC19v/2A Package Content: 1 x Audio Jammer 1 x Power adapter 1 x Remote Control 1 x Package box Frequently bought together Customers who bought this product also commonly purchased the following combination of items. voice jammer iphone 6s jammer Learn More

please note that this is only earpiece, not full set, the buyer should have inductions then can work with this earpiece. if buyer don't have it, then can buy full set in our store. this AMK808 earpiece is perfectly working with our GSM card box. We also have other AMK earpiece models, like 258A, A818, which is the smallest size . if you need any other earpiece, welcome to contact us. Description: Mini wireless earpiece is a micro-mini wireless inductive receiver which transforms audio signal through electromagnetic induction. These products make the covert communication possible when it is inconvenient to expose earpieces. earpiece is widely used in many departments .Using this device;You can hear the voice from the person other side,and the person of the other side can also hear your vioce. Hotspots: Small, light, easy to conceal. Comfortable for wearing with an optimum anatomic design Work principle: Mini wireless earpiece is a one-way reception equipment driven by electromagnetic induction and is used in conjunction with drive equipments, such as radio and mobile phone PRODUCT DESCRIPTION On many occasions, you possibly don’t hope others notice your operating mobile-phone or sth like this. Only 6x10mm(min 5x7mm) the 205 Completely-in-the-Canal wireless earphone is designed to be entirely concealed in the ear canal. It is the ideal device for unobtrusive reception without cables or wires of any kind. It is a new generation of earphone.205 possibly is the tinyest wireless receiver in the world. Virtually invisible when worn, 205 rests deep in the ear canal. The covert Assembly offers the best communications solution at times when secrecy and privacy are of paramount importance. For example, Surveillance, VIP Protection, Investigation, etc. The technical specifications of individual components allow them to be used with a wide range of personal radios. In the professional security field, this new micro receiver will be highly appreciated by security forces and special army units.205 allows you to inform, command and alert your team, without them carrying visible. Learn More

Android Phone OTG USB Infrared Night Vision Camera For Mobile Security Surveillance *Bring up an external Camera on Android device and use its display to view the live feed from the camera. *Support OTG Function:allow full compatibility with ALL OTG Compatible Android devices *Smartphones and tablets.Install CameraFi (free apps on Google Play),plug the camera and you are ready to go. *Smartphone are able to be supported OTG to recognize USB camera. *It works only for over Android Version 4.3 and doesnt work on Apple IOS Specifications: 1.Working system:OTG Compatible Android advice,Over Android 4.3 supported 2.APP:camerafi or USB camera, Free download from Google play store 3.Sensor:1/2.7" CMOS 4.Power :OTG 5.Image pixels:2MP 6.Image Format:YUV/MJPG 7.Audio:embedded microphone 8.Data Format:800*600,1280*720,1920*1080 9.Frame rate:640*480@30fps 1280*720@30fps 1920*1080@30fps 10.Camera control:auto/manually/saturation/contrast/acutance 11.White balance:automatically 12.Exposure:Average brightness 13.Sleep model current:<10mA 14.Working current:5V 150mA 15.Measure:30*42mm 16.Night vision light:850nm led φ3MM * 5pcs 17.Cable length:80CM 18.Storage Temperature:-20C to 60C 19.Working Temperature:-10C to 50C 20.Lens:exchangeable pinhole lens Learn More