This mini eavesdropping device is a great spy audio system, just insert a GSM SIM card into the slot of this spy audio device, and put the audio bug at a hidden place, then you just dial the SIM card number to monitor your target, this audio bug also features voice activated call back, so once it detects voice around it, you will receive its call at once to hear the sound around the audio bug(0-15m range), It also features solar charger to supply the power for this spy audio.
Specification
Frequency: Frequency: GSM 900/1800MHz
Voice activated call back and normal mode switchable
Transmission Distance: Non-limit
Card Compatible: GSM sim card
Solar charger to charge the internal Li-ion battery
Super bright LED light
Push to power ON the LED light
Receive Sensitivity: 10K
Stand-by Time: 5 days
Working Time: 3 hours
Sensitive Range: 0-15m
Accessories: AC adapter, USB cable
Power by either AC adapter or internal Li-ion Battery