Bluetooth Connection, Safe And Stable Wireless playback from your phone or other Bluetooth devices with a stable connection. Once paired, you can listen to music and audio from your preferred apps. Cassette Tape Recording And Playback Play your favorite cassette tapes, or insert a blank cassette to record your selected audio. SD/USB Card Playback Supports SD and USB card playback. Copy music from your computer to an SD or USB card and insert it into the unit for easy playback. Plugin Dry Battery Power Supply Operates on dry batteries for portable use, eliminating the need to stay plugged in and making it easy to carry when you go out. Use scenarios At home or in the office: Pair with a smartphone or tablet via Bluetooth to stream music from your favorite apps, or play back stored audio from SD/USB cards. For cassette enthusiasts: Listen to your existing cassette collection or record onto blank tapes using the cassette function. On the go: Use dry batteries to enjoy music outdoors, during activities, or while traveling without direct power access.