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User Guide: Installation： A: Intall the 337 battery to micro earpiece, plug in your ear. B：Cut GSM SIM card to Micro SIM card(like iphone4 SIM card size)，put it into the GSM car key slot, please check the correct direction. C:Place Gsm car key a right position to transmit audio signal to earpiece— distance is 0-70cm . D: Press the Power Button for 3 seconds, your will hear “system Start, please waiting” from your earpiece. press this button for 3 seconds again it will power off, you will hear“system Power off” from your earpiece E:You can press voice button to adjust the volume, three level(large,middle,small), when it adjust to large volume you will listen “di,di” sound in earpiece, press to change in cycle. F:`You can press Middle button to know the work status : If the yellow indicator lights, the machine is now power on . If no indicator lights, the machine is now power off. Now, install finished you can call the SIM card number in this this machine, you can listen and speak. Charging: Connect it to your cell phone charger or PC’USB port for changing via USB cable, during charging the LED will turn on RED, when is full will change to green. Learn More

1x Earpiece Set - One Spy Earpiece, One Battery SR416SW 1x Bluetooth Amplifier Loopset 1x USB Cable For Charging Learn More

Precautions: 1.The jammers are customized according to the frequency bands of different countries, please confirm that the purchase country and the actual use country are consistent. Otherwise it can not be used.Please read the jammer function before purchasing. 2.If the low power jammers(such as handheld jammers) to blocker high power signal device(such as high-power WIFI router, Bluetooth audio equipment, etc.), the effect will be poor or even can not jammer. 3.It is forbidden to use while charging. 4.Do not use handheld jammers as desktop jammers. 5.Do not use jammers before connecting the antenna. Jamming frequencies CDMA/GSM: 850-960MHz DCS/PCS: 1805-1880MHz 3G: 2110-2170MHz GPS: 1570-1610MHz WiFi: 2400-2485MHz LOJACK: 168-178MHz 4G: 2620-2690MHz or 2300-2400MHz Learn More

Parameters: Item Size:10.2cm*6.5cm*3cm Net Weight:120g Power source:DC 5V Recording form:WAV Packing size:15cm*11cm*5cm Gross Weight:340g Power:500MA Memory medium:SD card (8GB max) not including Package Contents: 1 * Mini Telephone Recorder 1 * Telephone Cord 1 * AC Power Adapter 1 * Manual Learn More

2017 Model GSM Neckloop Credit Card Earpiece Spy Bluetooth Kit SIM Covert Student Cheat Copy Exam Test ID Box Loop Surveillance Security Micro Invisible Loopset Hidden Mobile Portable Gadget Set Learn More

Just here the signal jamming device you are viewing here is the Newest USB Disk Mini GPS Jammer, which is designed to protect GPS signal and also the GPS signal tracking devices. Plug and play, usb interface,vechile use,streamlined fuselage design,fine workmanship,light weight and rich connotation,meet usb interface and android interface. Here this usb gps signal jammer can also OEM the frequency bands for you as well, if you have the need then just contact us and tell us your detailed requirements. Learn More

mini wireless 305 earpiece with louder sound 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. How to use: Wear the skin color loop on your neck or under your close if necessary. Connect the port with your cell phone and talk to the microphone just like an normal handsfree set but totally with no wire apear. 1. Open battery door, install the battery perfectly and push battery door into battery box gently. Put the earpiece into ear canal by holding the handle and the slight sound of current indicate working order. 2. Adjust the volume of drive equipment to reach satisfaction. 3. Set mobile phone to automatic return or vibration. 4. Put the inductive loop around your neck (or bluetooth pen, glasses, loop, watch..ect diferent inductions)and connect the inductive loop to the drive equipments (mobile phone, radio) which are attached to or beneath users clothing. One transmits message with radio, the other wearing an earpiece and inductive loop who also has a radio can hear the message very clear. Because the inductive loop inducts the message from the radio to earpiece and then earpiece transforms the electromagnetic inductive signal to audio signal to reach the wireless inception. Communication distances and radio power are the direct proportion. You can communicate with others freely once network exist when you use mobile phone 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. Structure: - 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. Technical specification: . Mini wireless earpiece (306 earpiece) receives signal by inductive coil. across electromagnetic fields . Receiving distance: 20-40 cm . Standard Zinc-air battery: type 337 . Battery life: about 3.5 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 20-40 cm What`s inside the box? 1 x 306 earpiece with box Learn More

Specification of headset Bluetooth version: V4.1 +EDR Operation distance: 10m Range of frequency: 2.4 to 2.4835GHz ISM band Sensitivity: -85db Music format: MP3/WMA Rechargeable lithium battery: 80mAh Type: stereo headphone with MIC Speaker: 14.2mm Impedance: 32 ohm Frequency response: 20HZ-20KHZ Rated Power: 20mW Power capabitity: 115mW Cable Length: 0.6m Microphone Unit: -58dB±3dB Parcel Include 1x BT313 Bluetooth Earphone 1x USB Charging Cable 1x User Manual Learn More

Features: 1). Convenient recording: Use SD card carrier for recording, can recording without computer. 2). Two ways for recording: You can set automatic recording or manual operation recording as you need. Incoming call will recording automatically. 3). Cycle of recording: support cycle of recording, when there is no more memory capacity, the earliest records will be overwritten. 4). Simple interface, easy to operate. 15). Blue LCD display. 6). With Clock function. 7). The equipment with a built-in Speaker. Supports MP3 music files playback. 8). The recording equipment with a 3.5mm headphone port, you can listen music, it will not disturb others work Parameters: 1.Item Size:10.2cm*6.5cm*3cm 2.Net Weight:120g 3.Power source:DC 5V 4.Recording form:WAV 5.Packing size:15cm*11cm*5cm 6.Gross Weight:340g 7.Power:500MA 8.Memory medium:SD card (16GB max) 9.Package Contents: telephone line * 1 Power supply * 1 Recording box * 1 Ahdcameras.com wholesale callrecorder,phone recorder,voice call recorder,spy call recorder,video call recorder,free voice recorder,phone conversation recorder,best call recorder online Learn More