Please note this listing is for the Radio Motor only. Display, Bezel and Knobs need to be added. For a complete radio build please visit Build Your Own Radio Motor 1B The Motor 1B feature set includes an AM/FM RDS tuner with 30 presets, a built-in 275-watt amplifier (18-watts RMS/40 peak x 4 channels), and built-in Bluetooth® for hands-free calling and high-quality audio streaming. The Motor 1B also includes a rear-mounted auxiliary input for portable devices. Features Built-in Bluetooth® (Version 5.0) Includes Bluetooth® microphone for hands-free calls AM/FM RDS tuner with 30 presets Selectable tuner frequencies USA/EUR/AUS/JAP/RUS Auxiliary input for portable devices Built-in 275-watt (peak power) Mosfet amplifier 18 watts RMS x 4 channels – TrueRating™ Non-volatile memory 1-Year Warranty Assembly is required Motor 2BThe Motor 2B feature set includes an AM/FM tuner with 30 presets, a built-in 300-watt amplifier (25-watts RMS/45 peak x 4 channels), and built-in Bluetooth® for hands-free calling and high-quality audio streaming. The Motor 2B also includes made-for-iPod®/iPhone functionality to control your Apple device, is compatible with all Android devices, includes a rear-mounted USB port with 2.1-amp device charging, a dedicated subwoofer output, and dual RCA pre-outs to connect an amplifier. The 32,000-color display is adjustable, allowing you to match your vehicle's gauge color. Features Built-in Bluetooth® (Version 5.0) Includes Bluetooth® microphone for hands-free calls AM/FM RDS tuner with 30 presets Selectable tuner frequencies USA/EUR/AUS/JAP/RUS USB port for flash drives and other devices 2.1-amp device charging via USB Built-in 300-watt (peak power) Mosfet amplifier 25 watts RMS x 4 channels – TrueRating™ Dual RCA pre-outs for external amplifiers Dedicated subwoofer output Adjustable color display Non-volatile memory 1-Year Warranty Assembly is required Motor 4HD The Motor 4HD feature set includes HD-Radio® technology, an AM/FM tuner with 30 presets, a built-in 300-watt amplifier (25-watts RMS/45 peak x 4 channels) and is the only classic car stereo that is SiriusXM-Ready®, allowing direct control of your SiriusXM Connect Vehicle Tuner. The Motor 4HD has built-in Bluetooth® for hands-free calling and high-quality audio streaming, made-for-iPod®/iPhone functionality to control your Apple device, and is compatible with all Android devices. The Motor 4HD also includes two rear-mounted USB ports with 2.1-amp device charging, dual RCA pre-outs to connect an amplifier, and a dedicated subwoofer output. The 32,000-color display is adjustable, allowing you to match your vehicle's gauge color. Features HD Radio® Technology SiriusXM-Ready® (SXV300V1 tuner sold separately) Built-in Bluetooth® (Version 5.0) Includes Bluetooth® microphone for hands-free calls AM/FM RDS tuner with 30 presets Selectable tuner frequencies USA/EUR/AUS/JAP/RUS Two USB ports for flash drives and other devices 2.1-amp device charging via USB Built-in 300-watt (peak power) Mosfet amplifier 25 watts RMS x 4 channels – TrueRating™ Dual RCA pre-outs for external amplifiers Dedicated subwoofer output Adjustable color display Non-volatile memory 2-Year Warranty Assembly is required