CallToU Waterproof Portable Doorbell Call button Vibrating Receiver with Flashing LED Color:2 Push Buttons+2 Portable Receivers The built-in 12V 23A battery

The built-in 12V 23A battery has an ultra long three-year lifespan

The system is expandable

Step 2 : Press the keyboard corresponding to the number

7 ounces Manufacturer CallToU Country of Origin China Batteries 1 AAA batteries required

emergencies)

CallToU Waterproof Portable Doorbell Call button Vibrating Receiver with Flashing LED Color:2 Push Buttons+2 Portable Receivers The built-in 12V 23A batteryPortable Wireless Doorbells Hearing impaired doorbell has a back clip can be placed in the belt or pocket to carry around, without the restrictions of the socket more convenient to remind, when someone comes to visit, from anywhere in the house can hear the call, suitable for the elderly who are hard of hearing and friends with hearing problems (need to use batteries) 4 Modes for You to Choose Deaf doorbell flashing light has: 1,ringing + vibration