1、30PIN: Bluetooth adapter receiver for ipod, for iphone Dock, Bluetooth music receiver with 30 pin connector, can be connected to Bluetooth speaker system. 2、COMPATIBILITY: Bluetooth receiver is suitable for iphone 4 4S etc. and speaker system with 30pin connector for devices, please check your device before connecting. 3、FAST TRANSMISSION RATE: Bluetooth sound receiver transmission rate 4Mbps, play your favorite songs on your device from a distance via BT connection. 4、BLUETOOTH: Bluetooth sound adapter is compatible with all Bluetooth enabled wireless music transmission (A2DP), so you can seamlessly enjoy music streaming without further manipulation. 5、EASY TO USE: Wireless bluetooth sound receiver is plug and play, instant installation, easy configuration, just plug, pair and play the music.