This Package Includes: 1 x Kenwood 4 Channel Bluetooth Amplifier 1 x 4 Gauge Amp Wiring Kit With today's smartphones hosting a wide variety of listening choices such as stored music, internet radio, podcasts, etc., it is no wonder that customers want to use this as their primary listening source. Bluetooth offers the easiest and most popular connection, KAC M1824BT is not only your standalone Bluetooth gateway but if used with an in dash receiver, it will double the power of a typical CD receiver with it's built in 45Watts x 4 of amplification. A water resistant controller can be used to adjust volume and change tracks. Many of today's powersports have very limited space to work in and tend to be a harsh environment for electronics because of the exposure to outdoor environments. Kenwood's compact performance amplifiers are small in size so they fit even the most limited installation areas. The amplifiers also use a conformal coated main PCB (printed circuit boards) which offer extra layers of protection to help prevent moisture or damp air from damaging the product. The KAC M1824BT remote control is designed to be mounted in places that are exposed to the elements. To operate in these conditions the remote control has a IPX 5 certification. This water resistant certification is the grade at which a device continues to function when directly subjected to 12.5 L of water per minute from all directions using a 6.3 mm inside diameter nozzle at a distance of approximately 3m for at least 3 minutes. This level of water resistance makes it perfect for ATV, Motorcycles and boats.