Features: brand new and high quality Can transmit the tape music to bluetooth-compatible receivers such as bluetooth-compatible speaker,headphone. Batteries(Not included) or USB powered operation. Can be used as an ordinary cassette player,also can connect to bluetooth-compatible devices. Small size and lightweight,easy to carry. When playing music, you can use the volume control knob to adjust the volume. Specifications: Material:ABS Size:15.5x11.1x4cm/6.1x4.37x1.57in Interface: USB Power Supply: Battery, or USB Power Supply Rated Voltage:5V Rated Power:5W Color:Transparent Note: Please allow 0-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1x Bluetooth-compatible Cassette Player 1x Earphone 1x USB Cable