Wireless Door Chime
Two tones optional: Ding Dong/Golden Melody Strong digital anti-interference Operating range up to 100m (no obstacles) Battery requirement: Transmitter: 9V alkaline battery Receiver: 3 x 1.5V AA alkaline battery Frequency: 315/433MHz +/- 0.5MHz
Wireless Door Chime product offered by Zhongshan Expert Electronics Co., Ltd