Characteristics:
GSM voice monitor
active voice
call back function / dial back
smaller safety device
support position
support USB charger
SIM card audio listening device with high-sensitivity microphone that can monitor the surrounding sounds at the same time
highly secret, is not easy to discover



Specification:
Interfaces: Android / iPhone
bands: 850 MHZ, 900 MHZ, 1800 mhz, 1900 mhz
hear distance: up to 15 m
without light, after the Sim card installed about 10 seconds, it is the will to connect
position: send DW message to SIM card
Recall sound: Send Message 1111 to the card Yes, first use, please call and communicate about 30 Second
send Message 0000 in order to Recall Sound
dial the SIM number and you can monitor the voices or sounds surrounding the bug



How does item work?
install a sim card to the cable (Sim card not include) (as picture) ----- connect the cable to 5V USB Power (5V USB power to Not include) ---- use your phone call it it ----- OK Sound of the monitor in real time