Solar Waterproof Wireless Doorbell Plug Smart Doorbell Bell 1 Button 1 Receiver | Doorbell (Black) Features: 1. Intelligent light sense: there is night light, the sun is not bright, the sky is bright, and the sky is out. 2. Strong penetration: The long-distancetransmission signal is stable, so there is no need to worry about not receiving the signal. 3. 52 kinds of music choices: the first one is beautiful and beautiful; the sound quality is crisp, there is always one you like. 4. 4-level volume adjustable:no longer because the sound is too loud, no longer inaudible because the sound is too low. 5. Energy saving: The transmitter solar charging host uses household electricity for less than a year. 1. Solar charging: save money, save trouble,and be environmentally friendly. 2. No radiation: Children and the elderly can use it with confidence. 3. Free pairing: One transmitter can match multiple receivers, and one receiver can also match multiple transmitters. Wireless doorbell features:1. Pure high-precision electronic materials, combined with unique long-distance technology, under the same power consumption, the wireless distance of the product can reach 300 meters.2. Using high-quality speakers, the doorbell output music is pure and high decibel.3. Adopt stable music chip, load 52 polyphonic ringtones, make the doorbell sound rich and pleasant.4. Adopt European and American design style, the appearance is fashionable and simple, let the doorbell embellish the beauty of the family.5. Humanized four-level volume adjustment to meet the needs of different environments and different sound levels.6. Digital double-panel circuit design, stable operation, strong and reliable performance.7. Humanized design, including the installation of 3M adhesive stickers and expansion screws at the factory, you can install it yourself without asking for professional help.8. The longevity design of the transmitter buttons can be pressed 5 times a day on average and can be used continuously for 15 years. Product Specifications:Host supporting use: transmitter + receiver [quantity can be freely matched]Transmitter working voltage: 3.7VTransmitter low power consumption: 10mwTransmitter battery: 150mAh polymer lithium battery (solar charge)Working reference index: 5.5V 25mA 0.13WWorking current: 12mAUse light to remind you to press the button for 0.5 seconds to respondReceiver working voltage: AC: 90-260V 50HzReceiver power consumption: 0.5WVolume adjustable range: 25 to 100dBOperating frequency: 433MHzWorking range: about 200-300m (open air)Protection class: IP65Delivery Quantity: 1 PiecePackage Contents: Only the above package contents, excluding other products.Size: Receiver: 8.5*8.5*2.5, Transmitter: 3.5*9*1.5cm(Reminder: The size is measured by hand, please allow 1-2 cm measurement error)Colour: Black(Due to different monitors and lighting effects, the actual color of the product may be slightly different from the picture color.)