BK-0825AB 2.4G Wireless Video-Türsprechanlage + 2.4 "c

2.4G Wireless video doorphone+2.4"color pocket monitor: DIY easy to installAble to view, talk and unlock the main entrance from any room in your housePortable size to carry2.4GHZ wireless video intercom and surveillancePortable hand free video color monitor Intelligent remote unlock for visitors/guestRechargeable battery via mini-USB interface, standby status for 72 hours.Able to intercom between each portable monitor300m transmission distance (without blocks)Full duplex audio mode2.4” TFT-LCD portable indoor monitorIR cameraAble to expand to 2 portable monitor with 2 of door station cameraAble to expand to 2 portable monitor with 2 of door station camera 12 selectable ring tones