ApexGear Self-Powered Wireless Doorbell, Thermo-Hygrometer Clock, 38 Chimes, Plug-In Receiver Household Use

・Kinetic Self-Generating Push Button Zero Battery Consumption: The outdoor doorbell transmitter generates electricity automatically via pressing force, no disposable batteries are needed for lifelong use. It saves recurring battery costs and is eco-friendly, with no need for frequent battery replacement troubles.

・38 Selectable Ringtones + 4 Adjustable Volume Gears Including Silent Mode: 38 assorted global melodies are available for one-click switching. Four volume levels are optional, with mute flash mode for quiet nights that turns off sound and only keeps light alert, perfectly protecting babies, elders and light sleepers from disturbance.

・3-In-1 Indoor Unit: Clock + Temperature Humidity Monitor + Doorbell Chime: The plug-in indoor receiver works as a 24-hour digital clock, indoor thermometer & hygrometer besides doorbell ringer. Celsius/Fahrenheit is switchable, you can check room ambient conditions anytime conveniently.

・Wide Voltage Global Adaptation & Stable Through-Wall Wireless Signal: Input voltage ranges from 90V to 265V to fit household power supplies worldwide. Reliable RF wireless signal penetrates interior walls stably, delivering timely doorbell alerts to every room of large houses and duplex residences.

・Plug-And-Play Installation, No Wiring Or Wall Damage Needed: Simply stick the outdoor self-powered button on entrance door with adhesive tape, plug the indoor host into wall socket to finish pairing. No complicated wiring or drilling is required, friendly for rental apartments.