This lovely baby monitor can avoid many trouble for you and your babies, it let you intomore happy life, china manufacturer specifications: outdoor range: 100 m, imaging sensor: 1/4 inch cmos , view angle: 62 degree , 2.5” Lcd screen display , -80dbm receiving sensitivity , 4 channel selectable , built-in speaker, camera dimension: 245*180*240mm , receiver dimesion: 128*75*30mm , accessories: 1pc adaptor, 1pc 9v battery, 1 battery clip.