Key features Bluetooth version 5.0 for wireless audio connectivity. Hands calling: when there is an incoming call, long press the pause button to answer. Recording function: recording is supported only in TF mode or USB mode. To start recording, long press the MODE button; to cancel recording and play the recording file, long press MODE again. A storage device must be connected while recording, such as a USB drive or TF card. Poweroff memory: device retains its state after power is turned off. Color screen display: clear color screen for easy navigation and information viewing. Storage and compatibility: supports USB storage devices and TF cards for recording and playback as needed. Control and operation: intuitive button operations using MODE and PAUSE buttons for recording and calls. Use scenarios In the car or during commutes: pair with a Bluetooth source to listen to audio and take hands calls. Incoming calls can be answered by long pressing the pause button, enabling safer, hands communication. In meetings, classrooms, or fieldwork: use TF or USB mode to record lectures, notes, or conversations. Start recording by longpressing MODE, and stop and play back recordings by longpressing MODE again. Ensure a USB drive or TF card is connected during recording. While traveling or exercising: enjoy wireless audio playback from a Bluetooth device, and rely on the color screen for clear status information. When needed, use the recording function to capture important audio and save it to an attached storage device.