Long Transmission distance: Communication distance is up to 80m outdoors and 50m indoors(adding a signal amplifier can extend distance).

999pcs Call Transmitter Max: This Watch receiver supports 999 pcs call transmitter max, you can add call transmitter as you need

3 Prompt  Modes: Light, vibration, buzzer three state switch, optional combination is convenient.

Advanced power saving technology: Advanced power saving technology makes standby time longer. Never lose date and time when turned off.