タイトルまたは説明

Gsm Magnetic Door Alarm
Features: 1. the world's infinite distance voice transmission ( using the GSM signal transmission, no distance limit can be inter-provincial cross-border) ; 2. ultra-clear sound 3. Small size as a match box, portable ( Normal wireless voice transmission equipment's deficiencies: short distance; Easy to be interfered, the sound is not clear; transmitter power supply time is short; bulky size , difficult to hide. But this product can effectively solve these issues) 4. **0/***0 or **0/***0 ( please contact to confirm **0/***0mhz if you need ) frequency 5. With lithium battery inside too ( *****0 hours standby for voice control,or ******0 hours for without voice control ) . Send GDM3 to check battery volumme . 6. Voice activated function: Send GDM1 to start voice activated control Send GDM2 to stope voice activated control . 7. Door magnetic sensor control ( means if your door is opened ,the alarm will send a message to inoform you that your door is opened ); Send GDM4 to start voice activated control Send GDM5 to stope voice activated control .