Features Blue Flash light on when guest pressing the remote button You can install the doorbells in locations, such as kitchen, back yard, bedroom, etc. never miss the guest Completely wireless operation - no wires or cables required Up-date intelligent flash light design brings convenience... Features Blue Flash light on when guest pressing the remote button You can install the doorbells in locations, such as kitchen, back yard, bedroom, etc. never miss the guest Completely wireless operation - no wires or cables required Up-date intelligent flash light design brings convenience to the hearing handicapped Wireless easy mounting design never affects your inner decoration and makes the doorbell anywhere you like All day long anti-interference system, pretends the doorbell from interferences outside or between neighbors Delicate smart part, makes the doorbell a saluting angel of dwelling house, woke building, hotel, factory and so on. You never miss any guest Specifications Choices for DC Supply 3V DC, two AA batteries Size of Remote button Approx 2.83"(L) x 1.57"(W) x 0.59"(H) Size of Door bell size Approx 3.86"(L) x 2.56"(W) x 0.98"(H) Color Mainly White Weight 155g / 5.47oz Package Includes 1 x Home Security Wireless LED Flashing Doorbell 1 x Doorbell Switch 1 x 23A 12V Battery