New Spy Ear Bug Monitor tracker GM910 Long-distance Cord-less monitor Sound pick-up GM-910 listening device

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).