1. Transform your non-Bluetooth speaker with 30-Pin connector on a common wireless Bluetooth speaker, freely and enjoy your favorite music (If it asks for a password, enter "0000"). Then you can free your forever.2. No battery in the product, supply by 30 pin dock speaker, simple operation; Plug and play.3. Support A2DP V1.2, compatible with all A2DP stereo Bluetooth transmitter adapter (including mobile phones of any Bluetooth version or any operating system, Android or IOS system) without any other messy lines everywhere.4. Freely and enjoy wireless music; Working distance is no less than 10 meters (30 feet)5. High Version Bluetooth 5.0 Chipset, quality Crystal Music box, helping you enjoy the pleasure of low latency music playback.How to use?1. Connect the Bluetooth receiver to the 30 pin speaker dock In the right direction, if it does not turn on automatically, please connect to it in the other direction. 2. Activate the Bluetooth function of your first phone 3. Search and pair for it. 4. If successfully paired, you can play your favorite song wirelessly.5. If you would like to pair with your second phone, please turn off the Bluetooth function of your first phone, and I-BT will go back to pairing state, and turn on the Bluetooth function of your second phone, and pair with it. . Once successfully paired, you can turn on the Bluetooth function of your first mobile phone, and I-BT will automatically reconnect your first mobile phone, and I-BT can pair with two mobile phones at the same time. And you can listen to music from any phone of the two by switching between the two.size:46.0*37.7*8.9mmcolour:blackMaterial:plasticPackage Contents:1 * Bluetooth 5.0 A2DP Music ReceiverOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.