Number of Channels : 1Regulated Output Voltage : 48V ±2V DCShort Circuit Output Current : 14 mAResidual Output Noise : -71 dBVFrequency Response : 10-25,000 HzAC Input : AT8801: 100-120V AC, 50-60 Hz, 2 W max.AT8801/EU: 230V AC, 50 Hz, 2 W max.AT8801/UK: 240V AC, 50 Hz, 2 W max.External Power Supply : AT8801: UL and CSA-approved AC power module with 6' (1.8 m) cable.AT8801/EU: CE and TUV-approved AC power module with 6' (1.8 m) cable. Input: Two 4 mm dia. pins, 19 mm apart (CEE 7/16 "Europlug").AT8801/UK: CE and TUV-approved AC power module with 6' (1.8 m) cable. Input: Three-pin BS 1363 connector for UK/Ireland.Dimensions : 5.12" (130.0 mm) W x 2.36" (60.0 mm) D x 1.73" (44.0 mm) H typical