CallToU Waterproof Push Button 1000+ Feet Classroom Home Office Business Store Color:2 Button+1 Battery Receiver How to pair more transmitters

How to pair more transmitters and select music

You can make them in a longer distance so that they will not have the noisy

by the lanyard

Operating Range is 500+ Feet in open Area

This alarm can remind us that the child is awake and detect that the child is in a in dangerous place

CallToU Waterproof Push Button 1000+ Feet Classroom Home Office Business Store Color:2 Button+1 Battery Receiver How to pair more transmittersMultifunctional Battery Doorbell: This wireless portable doorbell is very versatile, you can use it as an ordinary doorbell for home, classroom, office, business; you can also use it as a call bell for the elderly, children, patients, disabled, pregnant women and other family members who need help. Portable & Indoor & Outdoor: This portable doorbell is powered by 3 AAA batteries, it can still work properly for you when the power is off or there is no