"Model: HI25 (Wireless Doorbell)
Transmission Distance: Up to 150 meters in an open area.
Wireless Frequency: 433.92 MHz.
Battery Capacity (Transmitter): 210mAh (typically CR2032 button battery).
Battery Life: 6 - 18 months depending on usage.
Ringtones: 38 different ringtones.
Receiver Power: Plugs directly into a wall socket (EU plug).
Dimensions & Weight:
Transmitter: 70 × 40 × 11 mm (23g).
Receiver: 88 × 46 × 26 mm (42g).
Features:
Memory function: Retains sound settings even after power outages.
Easy installation: No wiring required.
Material: ABS. "
