Sony DSX-A410BT Bluetooth USB Head Unit Keep in touch on the road with Dual Bluetooth connectivity from the Sony DSX-A410BT. Wirelessly connect your first phone to play music, get directions and communicate with contacts. Add a second phone to make additional hands-free calls on the move. The Sony DSX-A410BT allows you to enjoy helpful smartphone features without taking your eyes off the road. Voice control lets you manage music, get real-time directions, and communicate with contacts - all via simple spoken commands. The DSX-A410BT has a built in four-channel amplifier delivers 4x55W of power, for loud and natural sound and EXTRABASS bring out the dynamics in your music, with enhanced low frequencies Use the front USB and AUX ports to listen to your favorite songs. WARNING: Product contains coin or button cell battery. Keep batteries away from children.Coin and button cell batteries can cause severe or fatal injuries in 2 hours or less if they are swallowed or placed inside any part of the body. If you suspect your child has inserted or swallowed a coin or button cell battery, call the 24-hour Australia Poisons Information Centre on 13 11 26.