Recording function: In USB/TF card music playback mode, press and hold the mode button to start recording. Press and hold the mode button again to stop recording. FM radio: Features an external antenna for stronger signal reception; default frequency range is 87.5–108.0 MHz. Bluetooth 5.0: Supports hands-free calling with enhanced signal stability and a transmission range of up to 10 meters. Sound quality: Built-in amplifier delivers clear, distortion-free audio output. LED lights pulse in sync with music frequency for enhanced visual effect. Power supply: DC 5V (recommended: 2A fast-charging adapter). Operating current: 1A (varies depending on audio source); standby current: ~40mA (no audio playing). Output power: 2 × 3W. Bluetooth pairing name: JQ BT. Uses a high-fidelity audio amplifier IC for loud, clean sound. This electronic DIY kit provides hands-on learning of basic electronics, circuit principles, and soldering techniques—ideal for students, hobbyists, and educators. Note: Slight variations in appearance may occur between production batches; these do not affect functionality. Color: As shown in image. Material: Plastic. Package includes: 1 × DIY Bluetooth speaker kit (unassembled components requiring soldering). Other accessories are not included. Note: Color representation may vary slightly due to lighting conditions and screen settings. Dimensional tolerance: ±1–3 cm.