KBTR Powersports Bluetooth ReceiverThe KICKER 51KBTR supports three popular types of audio playback (Bluetooth / AUX / USB - thumb drives only). Includes a dedicated subwoofer RCA out with separate sub-level volume control. Fits OEM double-switch knockouts on popular UTV dashes.Features: Stereo RCA outputs Dedicated subwoofer RCA line-out Popular OEM dash size Rugged weather-resistant construction Oversized buttons and three levels of illumination for user convenience Sub-level volume control Bluetooth music streaming, USB audio playback, and AUX input Traditional volume rotary knob Power On/Off + source button Play/Pause button Subwoofer RCA out with sub-level Up/Down buttons. Stereo RCA line-out and remote turn-on. Technical Specifications: Frequency Response - 20-20,000, +/- 1 dB Bluetooth Range - 60' (18.3m) Input Sensitivity - 1V RCA Output Voltage - 4V Subwoofer RCA - 100Hz low-pass, 12dB/octave Brochure (pdf)