Solar Powered Waterproof Wireless DoorBell Plug Smart Door Bell Chime 1 Button 1 Receiver|Doorbells(black) Features: *1. Intelligent light sensing: With the night light, the daylight will not light, the sky will be bright, and the sky will be extinguished. 2. Strong penetrating power: The signal transmitted at a long distance is stable, so there is no need to worry about not receiving the signal. 3. 52 music options: the first beautiful and beautiful; the sound quality is crisp, there is always one you like. 4. The volume of 4 files is adjustable: no longer because the sound is too loud and no longer because the sound is too small to hear. 5. Energy saving: The transmitter solar charging host uses household electricity, less than one year in a year. s: 1. Solar charging: save money, save trouble, and be green. 2. No radiation: the Ministry of Children and the Elderly can be used safely. 3. Freely pairable: one transmitter can be matched to several receivers, and one receiver can also be matched to several transmitters. Specifications: Receiver operating voltage: 90-260V Receiver standby current: 10mA Receiver operating current: 60 mA Receiver operating frequency: 433MHz Receiver power: ? 2w The receiver can adjust the volume: 20-80db (4th cycle adjustment) Transmitter solar cell: 150Mah polymer lithium battery Transmitter solar panel maximum power: 5.5V 25mA 0.13W Transmitter operating current: 12mA Transmitter working range: about 200-300m (open area) Transmitter waterproof rating: IP65 Music: 52 Color: black Transmitter size: 90*35*15mm Receiver size: 85*85*26mm Add transmitter or receiver Firstly plug into the socket, press volume button for 6 seconds, blue led light keep on, then press transmitter button, when receiver blue led flash, means pair successfully. It will fail paring if you can not finished within 6 seconds Attention: One transmitter can be matched with several receivers. One receiver can be matched with several transmitters as well., and with memory function once off power.