1、Support BT connection, and the audio can control the last/next song and volume of the music player, and can transmit sound when playing games and watching movies. 2、Digital MP3 player: support U disk, memory card, no need to switch, automatically read audio file playback after inserting memory card/U disk. 3、Built-in rechargeable lithium battery, which can be used in mobile after charging. 4、With radio function, FM high-sensitivity stereo digital receiving function. 5、Using a 3W speakers, combined with scientific acoustic structure design. 6、Adopt enhanced digital power amplifier, low power consumption, high power, strong and clear sound. 7、Multi-button control: volume and mode can be adjusted individually. The tone is soft, clear and dynamic, with distinct layers, suitable for outdoor sports, indoors, travel, biking, Cycle, hiking, camping, running, fishing, parties, poolside use. Features: Support BT connection, and the audio can control the last/next song and volume of the music player, and can transmit sound when playing games and watching movies. Digital MP3 player: support U disk, memory card, no need to switch, automatically read audio file playback after inserting memory card/U disk. With radio function, FM high-sensitivity stereo digital receiving function. Built-in rechargeable lithium battery, which can be used in mobile after charging. Using a 3W speakers, combined with scientific acoustic structure design. Adopt enhanced digital power amplifier, low power consumption, high power, strong and clear sound. Multi-button control: volume and mode can be adjusted individually. Specifications: Color: blue, black, red, gray, green (optional) Material: plastics+mesh FM frequency range: 87.5-108MHz Amplification frequency: 150-18000Hz (±3dB) SNR: ≥70db Power: 3W Battery: 3.7V, 300mAh Item size: 118 * 78 * 39mm / 4.6 * 3.1 * 1.5in Item weight: 90g / 3.2ounce Package size: 130 * 90 * 50mm / 5.1 * 3.5 * 2.0in Package weight: 100g / 3.5ounce Packing List: 1 * Speaker 1 * USB Cable 1 * Speaker 1 * USB Cable