Ready to use: This waterproof wireless doorbell for home is paired before delivery. No wiring or electrician installation is required during use, and installation can be done in 1 minute: plug the receiver into the outlet and it's ready to go. ;use. Long Distance: This high-frequency electronic technology wireless remote control doorbell adopts FM signal pattern, which has strong anti-interference ability and one-to-one signal matching. No need to worry about poor connection with signal nearby. And the detection distance can reach 150M in an obstacle-free environment. HD display for temperature, humidity and timeThe wireless doorbell is equipped with a sensor of temperature and humidity, which can know the indoor environment temperature and humidity change in real time, so that you can enjoy a healthy life. The time reminder function makes you never miss any important moment again. Weatherproof and Energy Resistant: The wireless battery doorbell is made of high quality ABS material, which has excellent flame retardant and flame retardant properties. Working temperature: 0-99. IP45 dustproof and waterproof protection. The transmitter adopts high-end self-generation performance and does not need to install batteries. Exquisite appearance and high quality: The doorbell has updated 38 songs and 4 adjustable volume levels. With 4 adjustable volume levels (with mute function) from 0dB to 100dB.We have advanced automation equipment, high precision placement. We strictly control product quality. Color:1 X Transmitter Precautions: Wireless signals are subject to obstacles such as metal, walls, concrete, etc. 1. Open the package, try the specific installation position first, then fix the bottom covers of the transmitter with the adhesive tape on both sides. 2 . Ifthereceiving distance is extremely short, avoidit on metal door or metal door frame. Please change the position of the receiver. 3. The receiver should be as far away as possible from places with magnetic fields or sources of signal interference such as induction cookers, televisions and speakers. 4. The closer the receiver receives to a straight line, the stronger the signal will be. Non-professionals should not open the repairs themselves, in order to avoid possible damage. #39;damage to precision electronic components. Please avoid prolonged exposure and installation in metallic places. The correct use of this product can effectively extend the service life. The actual use of the remote control control distance is reduced depending on environmental factors.