Item: h-wb-24 Digital wireless visuable doorbell Tech specification 1.Wireless intercom self monitoring unlocking calling 2.The non obstacle remote control distance is 150 to 180m 3.Color display screen in tft 2.4 inch 4.2.4g launch frequency 5.The power below 20dbm 6.Rechargeable 2400mah li ion batteries Packing details : Terms : fob shenzhen china Packaging : color box Pieces per carton : 12 pcs Inner box : 26*26*12cm Master carton meas cuft: 55*55*33.5cm Gross weight kg: 15kg carton