Color: Black + White + Blue - Material: Metal - Supports RS232 to RS485 Serial - Comply with ETA/TIA standard - Photoelectric isolation voltage: 2.5KV pulse/500V continuous - Transmission rate: 300BPS-115.2KBPS - Transmission distance: 1KM (9600BPS) - Working mode: unidirectional transmission simplex mode - Power supply: 12V/DC/300mA - Power consumption: 3W - Widely used in industrial automation attendance machine car parking ATM bus charge eatery automat and highway toll gate etc. - Package includes: - 1 x 220-250V power adapter (2-flat-pin plug/cable length: 105cm) - 1 x Serial port cable (A/M) (cable length: 82cm) - 1 x Chinese user manual