Upgrade Version 30 Pin Bluetooth 5.1 Audio Receiver A2DP Music Mini Wireless Adapter F IPhone IPod Jack Analog Speaker Description: Suppt Bluetooth 5.1 protocol specification Suppt Lingo protocol device authentication Suppt automatic identification of certified non-certified base audio Transmission distance: not less than 10 meters Interface: stard iPod 30pin interface Dimensions: 44367mm 2 indicat lights flash alternately when there is no connection, the blue light flashes slowly after connection Product Instructions f Use. Equipment identification: 1. Turn on the speaker, plug the product into the docking seat, the front rear LED lights begin to flash rapidly, indicating that it has entered the pairing mode, indicating that the device is wking nmally. Since the machine is facty defaulted to automatically reconnect, please turn it on f 30 seconds befe pairing the Bluetooth device. 2. After the device enters the pairing mode, turn on the bluetooth function of the computer, mobile phone, etc. other digital products with bluetooth output function, search find the bluetooth device, find the bluetooth device of to connect, 3. After the pairing is successful, the front rear Bluetooth LEDs will flash slowly, indicating that the connection is successful, you can play music wirelessly. 4. During nmal operation, if you want to change the playback device, you need to interrupt the connected computer, mobile phone other Bluetooth output devices, then pair connect with other Bluetooth devices. If you cannot connect, please remove this product reinsert it. That's it. Note: Only analog speakers are suppted, digital speakers are not suppted. If you can't use this product after receiving the goods, it means that this adapter is not compatible with your speaker, it's not a quality problem, please don't give us bad reviews, thank you This item is Not Compatible with f Car Stereo System. This item is Not Compatible with f Digital Speakers.