The RCF BT BOARD is an additional board that allows to connect a DMA amplifier to a mobile device using Bluetooth technology. This makes possible to send audio from the mobile device to the amplifier and at the same time control it, in terms of levels and Equalization of inputs and outputs. To control the amplifiers, an Android and iOS app is available for download. Product Specifications: Compatible models: DMA 82, DMA 162, DMA 162P Power supply: From DMA unit Number of pairable devices: 4 Audio streaming: Yes Amplifier control: Yes Technology: Bluetooth 5.0 Safety agency: CE compliant Colour: Black – RAL 9005 Product Height: 49 mm / 1.93 inches Product Width: 56 mm / 2.2 inches Product Depth: 56 mm / 2.2 inches Product Weight: 0.03 kg / 0.07 lbs. Shipping Height: 88 mm / 3.46 inches Shipping Width: 219 mm / 8.62 inches Shipping Depth: 156 mm / 6.14 inches Shipping Weight: 1 lbs