ZTOP&reg;2.4 Inch Rechargeable Wireless 2.4 GHz Digital Video Baby Monitor With Night Vision, Talk to Baby Two-way Intercom, Zoom In/Out, Auto Scan Working Cameras, 4 Channels 4 Channels,support 4 cameras for one monitor. If one LCD (parent unit) with 2 or more cameras, the LCD can scan the working camera mannually or automatically 2.4" LCD Digital Baby monitor, Video to see your baby with 2.4" LCD color screen, can adjust the effect of image, can also see video on TV with TV out function Automatic infrared night vision. Belt clip on parent's unit, portable parent unit Adaptor operated for both units. Parent unit/ monitor can be rechargeable with rechargeable battery inserted. Baby unit/ camera can be battery operated, 3 x 3A normal battery (batteries not included) 2 way talk, can communicate with your baby. VOX function (Automatic voice activation power saving mode - monitor unit shuts down automatically if no noise is sensed). Transmission range: 100-150m (in open areas)