Product size: 153.1*52.6*28.3mm; Each intercom requires 4 AAA batteries (not included). Selecting multiple channels avoids strange sounds on channels; Function to adjust volume and enable/disable Roger tones or beeps. Reliable range; The range of this children's intercom can be applied outdoors; Neighboring houses; Up and down stairs indoors. The Vox function; We can put the intercom next to us and talk directly without having to press the PTT all the time; Let go of our hands. A one-to-one or one-to-many communication function; People can work on the same channel and same ctcss no matter how many retevis talkie Kids walkies. RT637 intercom for kids can be used at night; The bright built-in flashlight and green LCD display are popular products for children ages 6-12. Keypad lock and belt clip; Effectively prevent inadvertent channel changes and ensure call continuity; Fix the intercom firmly to avoid unnecessary loss and fall. We only sell walkie-talkies and not other items in the pictures. Due to differences between different monitors, the pictures may not reflect the actual color of the goods. Please allow subtle size error due to hand measurement.