1.English/Spanish/Russian/Chinese language available;
2.Dot matrix LCD screen;
3.Low power remind; 
4.Prompt mode: Beep, Vibration, Light;
5.Support 999 wireless transmitter buttons, name of transmitter can be edited;
6.Display latest 3 call records on the screen;
7.Never lose date and time when turned off;
8.Built-in high capacity rechargeable lithium battery;
9.Latest 99 groups calling records can be checked;
10.Operating voltage: 3.7V rechargeable lithium battery, USB-5V to charge;
11.Operating current:3mA;
12.Standby current:<20µA;
13.Wireless frequency: 433MHz;
14.Receiving distance: 400 meter (open area);
15.Working temperature:-20℃ - 55℃;
16.Code: 1527;
17.Size: 61×41×14mm (Not include watchband)