Wireless doorbell, smart LED doorbell for home use, 1 bell and 1 doorbell button with a range of 300 meters, white

Features and Specifications: Color: White, Black; Receiver Voltage: AC 110–240V; Ringtones: 38 polyphonic ringtones; Remote control optional; Range: 300 meters; Transmitter Power Supply: 12V 23A alkaline battery (not included); How to pair the signals: Pairing method: Press and hold the volume button on the receiver for approximately 5 seconds (the indicator light will illuminate), release the volume button, and immediately press it again. The signals have been successfully paired. Package Contents: 1 x Outdoor Transmitter, 2 x Indoor Receivers