Bluetooth - play and control music through your smartphone or mp3 player as well as apps like Spotify and pandora, wirelessly push to talk - now you can connect with your smartphone's assistant with a push of a button. Linked via Bluetooth to your phone, the ml43b lets you access information, accept commands, and keep driving weatherproof - the receiver & speakers have been outfitted with the latest weatherproofing techniques to protect against splashing water.