星汉灿烂电视剧免费观看国产,免费国产草莓视频在线观看,国产亚洲在线久久精品视频,青青青国产在线观看免费,久久精品国产**免贵,国产高清视频在线免费,亚洲国产成人久久久精品,国产精品99r8免费视频,久久久久精品国产**水蜜桃,国产美女免费直播

- Operating range up to 100 meters in the open area

- Using high frequency transmit technology and innovative function of same frequency with different code, one doorbell has one code to avoid disturbing from neighborhoods

- 3 melodies

- Receiver Battery: 3 x C (not included)

- Transmitter Battery: 1x3V CR2032 (included)

- N.W. of Receiver (doorbell): 157g

- N.W. of Transmitter (button): 21g

- Approval: CE, RoHS

- Radio Frequency: 433.92MHz

- Waterproof of transmitter: IP20