TECKNET Longest 1300 Feet Wireless Doorbell with RGB Alarm Lighting,Battery-Powered IP66 Waterproof Design,60+Chimes & 5-Level Volume for Home/Apartment/Classroom/Business,4.5-Year Battery Life,Black

TECKNET Wireless Doorbell 1300FT, IP67 Waterproof Classroom Doorbell Battery-Powered Door Bell, 60 Chimes 5-Level Volume, 4.5-year Battery Life, Electric Doorbells No Plug-in Required for Home

TECKNET Wireless Doorbell, Plug-through Door Bell, IP66 Waterproof Doorbells, 1300ft Cordless Rang Door Bell Ringer Wireless, 60 Ringtones & 5 Level Volume, 0-110 dB Doorbell Chime for Home/Classroom

TECKNET Wireless Doorbell 1300FT, IP67 Waterproof Classroom Doorbell Battery-Powered Door Bell, 60 Chimes 5-Level Volume, 4.5-year Battery Life, Electric Doorbells No Plug-in Required for Home

TECKNET Plug-in Wireless Doorbell with RGB Lighting & 1300 Feet Range,IP66 Waterproof Doorbell for Home/Classroom/Office/Business,60 Chimes,5-Level Volume,4.5-Year Battery Life(White)

TECKNET Wireless Doorbell, Plug in Door Bells Wireless Cordless with 2 Receivers, IP66 Waterproof Wireless Door Chime Kit with RGB Light, 400M Wireless Range, 60 Chimes, 5 Volume Level (White)

TECKNET 2 in 1 Wireless Doorbell with Bluetooth Speaker, Portable Doorbell with RGB Light, IP66 Waterproof Wireless Door Bell, 0-100dB, Portable Speaker with Stereo Sound

TECKNET Self-Powered Wireless Doorbell Kit - Plug-Through Door Bell with RGB Light, 60 Chimes & 5 Volume Levels, IP66 Waterproof Classroom Doorbell, 1000ft Range Doorbells for Home/Office