Wireless pairing indoor doorbell WIFI video doorbell indoor Dingdong machine $ 7.06 Features: Fashion look and touch design Easy to install Ultra-low power consumption design, power saving and lasting use 52 polyphonic ringtones of your choice 4 levels of optional volume adjustment technical parameter Working voltage AC 90~250V Working frequency 433.92 MHz +-280 KHz Power consumption 10 mW Transmit power 0dbm Sensitivity -110dbm Net weight 92G Volume 10-110db Size 818120mm
