Model: TM-6000U Color: Black Output: 5W+3Wx2 Sensitivity: 500mV S/N ratio: 65dB Isolated rate: 3''+2''x2 Power: USB 5V Channels: 3 (2.1) Size: Main Speaker: 15*20.3*22cm Small Speaker:9.4*7.5*13.3cm Function: With TF Card Slot, USB disk slot, FM, LCD screen, Clock display Special Feature:Portable, BT Wireless Use: Computer, Home Theatre, Karaoke Player, Mobile Phone, Portable Audio Player, Stage