Gobikey Battery-free wireless doorbell outdoor waterproof IP55, doorbell wireless set ​ without battery with 52 melodies, 5-level volume (0 dB - 115 dB), 150 m range

• Wireless bell battery-less: wireless bell battery-free, batteries are not required for buttons and receivers. Pressing down the button creates a mechanical force that itself generates electrical energy and sends a stable signal to the receiver. Eliminates the need to change or charge batteries
• 52 Bells & 5 Volume Levels Wireless bell offers a whopping 52 bell sounds as well as five volume levels. From simple dingdong to more sophisticated melodies, listen to several and decide which sound we prefer, and also change the volume as you like
• LED display with mute mode: built-in 7 LED flash lights on the receiver, wireless doorbell lights up at the touch of a button and give us a visual indication that someone is at the door. A lighting option is particularly important for the baby's fall asleep and nap time
• IP55 waterproof and weatherproof: doorbell wireless in IP55 waterproof can withstand different weather conditions. Wireless doorbell is not damaged all year round due to temperature fluctuations, rain or snow. Extends the service life and works perfectly from -20°C to 60°C
• Easy installation and memory function: intelligent home doorbell radio with memory function that preserves our settings in the event of a power failure. Convenient and easy to install, requires no electrical wiring and provides more freedom where the homeowner can install the doorbell

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