What's in the box:

Intelligent Visual No-Wire Doorbell Universal Type Indoor Amplifying Receiving Acousto-Optic Remind Loud-Speaker (Black)

Indoor loud-speaker, used with visual doorbell, no-wire long distance transfrom, high brightness, strong penetration, zero radiation, intelligent anti-harassment, prevent string-ring, 52 chord ringtones of your choice, level 4 optional volume adjustment, plug and play, intelligent convenience.

Features:
Indoor loud-speaker, fashion simple shape design, convenient to install and use.
Used with visual doorbell, plug and play.
Ultra low energy consumption design, energy saving and lasting use.
No-wire long distance transfrom, high brightness, strong penetration, zero radiation.
Intelligent anti-harassment, prevent string-ring.
52 chord ringtones of your choice.
Level 4 optional volume adjustment.

Specifications:
Color: Black
Energy Consumption: 1.5W
Work Voltage: Alternating Current 90-250V
Work Frequency: 433.92 MHz +-280 KHz
Sensitivity: -110dbm
Volume Range: 4 Level Adjustable, 10-110db
Ringtone: 52 Optional
Package Weight: 120g / 4.23ounces
Package Size: 100 * 100 * 30mm / 3.94 * 3.94 * 1.18in
Plug: 3 Types (optional)

Note:
There are 3 different specifications plugs optional, please choose the one suitable for yout country.

Packing List:
1 * Doorbell Loud-Speaker