Wireless Doorbell by LUAMB 1,000ft Range Loud Enough with 5 Volume Levels and 52 Chimes LED Flashing,1 Push Button and 2 Receiver.
LUAMB
Wireless Doorbell IP66 Waterproof 1000 Feet with 56 Chimes 115dB 7 volume levels Mute Mode with LED Flash Doorbell Ringer Wireless for Kids Room Teachers Classroom Home Office & Hearing-Impaired
LeadGo
TECKNET Wireless Doorbell, Self-Powered Doorbell with 2 USB Ports, IP65 Waterproof Door Bells, Cordless Door Chime Kit with 60 Chimes, 5 Adjustable Volume and 1300Ft Range for Home Classroom Office
TECKNET
Philips Wireless Doorbell Kit, Battery to Operated Reciever, 1 Push Button, 2 Melodies, 4 Volume Levels, 150 Ft Range, White, DES1120W/27
Philips