ESYNIC Dock Music Receiver 30 Pin Bluetooth 4.0 Receiver A2DP Wireless Music Receiver with APTX CRS Technology for Bose Sounddock iPod iPhone 7 7 Plus Dock Speaker Music Docking Stations Bluetooth 4.0 with APTX Technology: Built with APTX Technology for Superior Sound Quality, and Bluetooth 4.0 Receiver Makes Your Phone Freely for Chatting and Playing. 30 Pin Bluetooth Receiver: Freely Listen to Your Music Play List without Docking Your Phone or Tablet, Just Need to Turn Your Phone Speaker Dock with Apple 30 Pin Connector into a Bluetooth Music System. Mini Size for Carrying: Lightweight and Portable Size, Bring More Convenience for Carrying and Using. Easy to Operate: Simply Connect Your Speaker with Our Bluetooth Music Receiver, Immediately Transform Your Speakers into a Fashionable Wireless Bluetooth Speaker. Compatibility: Compatible with Bluethooth Device, Samsung Galaxy S3 S4, iPone 4 4S 5S 5, HTC or Android Phone, iPhone 6, iPhone 6 Plus or Tablet and so on. (NOTE: Only Works with 5V Dock Speaker that charge iPhone 4/4S, Not works for 3V/12V Dock Speaker that charge iPod/iPhone 3/3G.)