Check the listing for details. HELMER Integrated In Wall Stereo Audio Amplifier,Wall Mount Audio Receiver L50WT. Color: White, Condition: New. Listed at 109.99 USD. Model No.: L50WTColor: White It's integrated amplifier installed in wall and have control unit on wall that you can control by mobile phone(Bluetooth-Compatible). You have Bluetooth-Compatible connection to play music from your phone/pad/computer. Also you can play music from Micro USB or Micro SD card. This unit is widely used for room for home, office, hotel,etc. It's recommended to connect with 2 speakers. Product Features Stereo Amplifier Module (2 x 15W) connect up to 2 speakers. BT connectivity for wireless audio input of pad, smartphones, etc 1 x Wired Audio Input (on rear PCB) Micro USB and TF card player (at bottom of unit) Music Player Screw terminations on the rear of the unit for loudspeakers, power and wired line input Includes in-line power supply Technical Specifications Power Supply: AC100-240V, 50-60Hz Power Output(max): 2 x 15W @ 4Ω Output Impedance: 4Ω or 8Ω Extended Micro SD card up to 32G BT Transmission Distance: ≤ 15M Product Size: 86 x 86 x 44mm Package Contents 1 x Amplifier 1 x mounting frame 2 x screws for mounting 1 x back box 1 x Micro USB to USB connector