describe: Wireless doorbell, 300 meter range waterproof doorbell, wireless doorbell with 1 transmitter and 1 plug-in receiver Long-distance signal: The wireless signal has strong penetrating power. In an open place, even if there are many obstacles (doors, walls), the signal can be transmitted up to 300m long distance. 36 Melodies and 4 Volume Levels: By pressing the button on the receiver, you can choose from 36 CD ringtones, including 4 adjustable volume levels from 25dB to 85dB. Waterproof doorbell: The transmitter button is made of high-quality materials, and the waterproof rating reaches IP44 standard, which ensures stable performance when used outdoors without worrying about various weather conditions. LED Flash: Buttons and blue LED flashes on the receiver provide visual indication to visitors and visitors. It's also a fun and detailed design for people with hearing impairments, and it lights up when in use. EASY INSTALLATION: Connect the portable receiver to any power source in just 2 steps and stick the transmitter to the wall using the included patches or screws. The receiver does not require batteries. Unplug the receiver to stop the ringer from ringing. Product name: Wireless doorbell white color Plate: European standard Waterproof performance: transmitter waterproof grade IP44 Working temperature: -30 to +70 Working frequency: 433.92MHz+75KHz Receiver voltage: 100-260V/50-60Hz (wide voltage) Transmitter battery: 12V23A mercury-free environmentally friendly battery Ringtone: 36 options, learning code, DIY Volume: 0-100 decibels, level 4 Package content: One to one (1 transmitter + 1 receiver)