MEO-SUND-BTFM2 The sticker with the product number is slightly peeled off. ^_^; There are no problems with its use. Music playback and charging are both possible. No box or instruction manual. How to use: ① Plug the main unit into the cigarette lighter socket. ② Press and hold the pairing button, and then select MEO-SUND-BTFM2 from your smartphone's Bluetooth connection to complete pairing. ③ Select from 88.1/88.3/88.5/88.7MHz using the band button on the main unit.