Purchased about 7.8 years ago and stored as a backup in a studio, so the total usage time is about 10 hours. There are no problems at present, including no crackling. Cables and instruction manual included. Ultra-compact 180W 5-channel powered mixer equipped with a multi-FX processor and FBQ feedback detection system. External dimensions: W470 x H117 x D225mm Weight: 7.2kg Power consumption: 290W Input/output terminals: Microphone input up to 5, line input up to 2 Output RMS (105W / 4Ω, 65W / 8Ω) Output PP (180W / 4Ω, 100W / 8Ω)