Voye Wireless Doorbell, Model V009b.

Wireless System: Operates without wires for easy installation. Range: Up to 150 meters in open areas. Sounds: 38 polyphonic sound options. Power: Receiver operates on 230V-240V. The transmitter includes a 12V battery. Installation: Mounts easily to walls, no wiring required. Adjustable Volume: Allows customization of sound level. Other features: Includes an energy-saving system, anti-interference design, and a blue LED indicator.