Product features:Used as a walkman, play cassette tape music everywhere.With Bluetooth out function, can transmit the music to other Bluetooth receivers.With Auto-reverse functionFM mode can receive radio(with 3.5mm earphone as antenna)3.5mm earphone jackPackage ContentsBluetooth Cassette PlayerUSB CableUser GuideEarphonePower SupplyYou can run theUSB Cassette Playervia batteries or your PCs USB power.Slide back switch to open theCassette Player. Open the battery box and insert 2*AA battery, and make sure the battery has been correctly connected, and replace the battery box. Or connect the USB output connector of device to PCs USB Bus.Operation:Earphone slot: enjoy music when earphones are in the slot.When playing music, you can use the volume control knob to adjust the volume.Press DIR button to auto-reverse the cassette.Press PLAY button to play the cassette.Play Mode: Selects what the cassette does when it reaches the end of a side. When set to the loop icon, the cassette will automatically switch direction and begin playing the opposite side when one side has finished. When set to the single arrow icon, the cassette will simply stop when a side has finished.Press F.F button to Fast Forward the cassette.Press REW button to Rewind the cassette.Press the "STOP" button to stop playing the tape and the Bluetooth connection will also be disconnected.How to Connect to Bluetooth Receiver ?Please make sure to turn on your Bluetooth receiver devices at first.Then Put 2*AA batteries(Not included) into the battery case or used by DC power(Not included) .Long press Bluetooth button 3 seconds to turn on Bluetooth function,led white light on and fast flash,will auto search and pair the Bluetooth receiver,Put in the tape and press the PLAY button. When the device successfully pair the Bluetooth receiver, led white light keep on, Dont put earphone in slot when Bluetooth open.If it does not have any Bluetooth device to connect, after the LED white light fast flash for a while, Bluetooth will auto turn off.How to connect Mobile phone Bluetooth and use FM ?1. Earphone(or speaker with 3.5mm Aux male) plug into earphone slot, Long press Bluetooth button 3 seconds to turn on, press FM button to search radio,led light turn to blue and flash,2. When voice announce Bluetooth mode on, turn on Bluetooth on the mobile phone, search and pair device HC01, led keep blue light on means connect successful, mobile phone audio play through earphone or speaker. Press+ or - button to adjust volume.3. On FM mode, press PLAY/STOP button to search radio, Press+ or - button to adjust channel.4. When FM mode on/ mobile phone Bluetooth connected,you can not Play cassette.