This superb battery-operated doorbell features a wireless design. It comes with a waterproof transmitter that can be easily installed either outdoors or indoors. The receiver unit has a strobe light designed for those with profound hearing loss. 32 sounds are available for selection. 

• Transmit up to 100m in open air.
• Transmitter power supply: battery (12V, 32A).
• Receiver power supply: 3 x AA batteries (1.5V).