... -300meters in open air 3.5 inch TFT color dispaly wireless video door phone VDP616+CAM206 AdvantagesWireless, easy to install, can avoid the ... design l Can store up to 255 pcs of photosl Audio and video transmitter unlock, monitor functionl Battery capacity. signal , ... can support more monitorsl Can unlock the door remotely using separate electronic lockl Video and audio outputl Can store up to 255pcs ...