Product dimensions: width 56mm, thickness 30mm, height 145mm (including antenna). Product material: ABS. Product supply: 4 AAA batteries per unit (not included) If you don't intend to use them long term Please turn off the device and remove the battery Transmit power: 0.5w, dialogue distance 0.5 - 3KM from the horizontal plane. Call ringtones selection: This machine has a variety of different ringtones to choose from, suitable for the customization of you. Channel scanning function: this possibility automatically scans 22 channels in order and can select a valid channel currently in use. Night lighting function: there is a small lighting lamp (white lamp) on the top of the machine, which can be used as a flashlight at night to facilitate the night work. Equipped with a belt clamp that allows children to place the intercom at the waist or elsewhere. Other functions: Backlit LCD display Multiple channel selection with channel display Battery detection Ten call tone options Tone switch function Key switch function Memory and recovery of factory settings We only sell walkie-talkies , no other items on the photos. Due to differences between displays, the pictures may not reflect the actual color of the item. Minor dimensional errors are allowed due to manual measurement .