Heavy Duty, Direct Plug and Play stereo radio with Bluetooth for a wide range of tractors and vehicles utilizing a 24 volt electrical system as well as an ISO 16 pin block harness or 2 x (2x4 pin) configuration (see photos). If you are unsure if this unit is compatible, please check the radio cavity prior to purchasing for mating harness. This unit will NOT work on a unit with a 12 volt DC stereo setup. Please ensure there is ~ 18 - 32 volts DC across the battery (yellow) and neutral/ground (black) wires in the radio cavity prior to ordering as this unit will physically not turn on unless this condition is met. Having a 24v vehicle / tractor does not mean you have a 24v radio as it may have a built in step down transformer. If replacing a defective radio, check the radio chassis to ensure it is in fact a 24v unit. If you require a pigtail so as to not cut into the vehicle harness, you will also need to purchase a 16-pin harness, item number: TR-1341 from our store. You can always send us a photo and we will ensure you get the correct harness! This unit takes 5-10 minutes to install and is fully direct plug and play! Included: 1 x single DIN 24 Volt radio to fit your compatible tractor or vehicle AM/FM Stereo Radio with internal memory backup (constant power not required to save presets!) Bluetooth Music Streaming - Listen to Spotify or stream any iPhone/Android music apps Bluetooth Hands-free calling (call and talk on the phone while getting work done!) USB for listening to MP3's! Front auxiliary input (standard 3.5mm plug - iPod, MP3 player, etc.) Mounting / installation cage (Can also be direct mounted with 5x6mm screws)