Wireless BT Connection: This BT cassette player can wirelessly transmit cassette music to your BT headphones or speakers, eliminating the need for wired headphones or speakers, and allowing you to enjoy the convenience of wireless. Multiple Power Supply Methods: The device can be powered by 2 AA batteries or USB, providing multiple power supply methods to meet your different needs. Auto Reverse Function: With the auto-reverse function, you can choose to listen to music on one side or both sides according to your preference, which is simple and convenient to operate. High-Quality Sound: Using BT technology, you can wirelessly stream your favorite songs from a distance. The sound quality depends on the feasibility and quality of the cassette, providing a high-quality sound experience. Portable Design: The device is small and portable, it can be your perfect companion wherever you go, allowing you to enjoy music anytime, anywhere. BT Version:BT 4.2 Effective Distance:About 10m Supporting Agreement:A2DP, AVRCP, AVCTP, AVDTP, HFP, SPP, , ATT, , GATT, RFCOMM, , I2CAP Signal-Noise Ratio: 90db Frequency Range:2.402GHz - 2.480GHz Audio Channel Stereo:L/R Audio Input:Cassette tape Audio Output:3.5mm earphone jack, BT transmitter Control Buttons:PLAY, STOP, F.F, REW, DIR. Auto reverse switch, Volume control. LED indicator:Quick flash for search BT receiver, slow flash for pair successful. Power Supply:2xAA Battery(Batteries are not included), or USB port power supply (5V DC adapter) Bit Rate:128Kbps Product Size:113 x 85 x 32 mm Product Weight:180g Due to different product batches, the appearance but not affect the use. Colour:As Shown Material:Plastic Package Contents: 1 * BT Cassette Player 1 * USB Cable 1 * Earphone Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.