Wireless bt 5.0 speaker, free your hands. Reasonable design can fit the neck and shoulder curve, making it more comfortable to wear.   Features: While enjoying the music, will not disturb the quietness of others, and open a perfect music world for yourself.  No matter when you are enjoying music on your own device or using FM feature, surround sound effect can be experienced in a clearer and more stereoscopic way.  Equipped with 2 units for exclusive true surround sound.  Personality radio, choose your own favorite FM radio style.  Support WAV and MP3, which allows you to listen to the lossing beautiful music.  Left and right channel is separated, with stereoscopic sound effect together this speaker can help you locate position accurately, easily win the game.  2 independent bass passive plate design, making bass more powerful.   Specifications: Color: black;  BT: 5.0;  Material: metal+plastics;  Frequency range: 2.4GHz-2.48GHz;  Frequency response range: 20Hz-20KHz;  Output power: 2 * 1.5W;  Battery: 3.7V, 650mAh;  Item size: 232 * 176mm / 9.1 * 6.9in;  Item weight: 207g / 7.3ounce;  Package size: 252 * 186 * 60mm / 9.9 * 7.3 * 2.4in;  Package weight: 280g / 9.9ounce;   Packing List: 1 * Speaker;  1 * Power Cable;  1 * User Manual