20-inch B/W Security Surveillance Monitor. Max. 1000 TV lines of horizontal resolution. 2 Video inputs with 2 Looping through BNC connectors. 2 RCA inputs with 2 Looping through RCA connectors. Max. 1.5W speaker output. EIA/ CCIR auto switch. Metal cabinet. Power switch, video select, contract, brightness, H-hold, V-hold, Volume. Full range 100~240V 60/50Hz AC power input