Product compatibility:Not compatible with iPod Touch 2nd generation and iPod Touch 1st generation, iPod Nano 6, iPod Mini (4GB), iPod Touch 2nd generation, iPad Touch 1st generation and iPod Classic (30GB).Not compatible with iPods before 2007, iPod Classic (30GB), ipod 60GB,ipod 160GB,Ipod disk 80GB compatible with LG、Sonos、Move and Roam Bluetooth speakers.compatible with Bluetooth speakers such as Fugoo and Jam rewind)The automatic pairing function does not support mutual connection with car speakers. Some devices may fail to automatically connect because Bluetooth is already connected to other devices (including mobile phones, tablets, etc.).Due to compatibility issues, the volume of speakers, stereos, and car speakers cannot be controlled, and the volume can only be controlled through the iPod. Please note that some customized iPods may not be able to control volume either.How to use?1. Simply plug the adapter into the 30-pin connector on your iPod,2. Pair with a BT device (i.e. BT headphones or BT speakers, BT music receiver) and make sure your BT device is not connected to other transmitters. The BT transmitter indicator light flashes and pairing starts.3. After successful pairing, make sure your iPod has sufficient power and the transmitter is powered by your device.4.Once paired, your device is remembered forever.Product specifications:Frequency range: 2.42-2.480GHzSupport Profile: A2DPRange: up to 10m/33ftWorking current: Max.40MAProduct size: 40*32*8mmPackage include:1x classic transmitter1x use manual