Connect your iPhone, Samsung, Android, or Bluetooth device to experience the best quality stereo sound. Enjoy conference wireless Bluetooth music feature in the office or with a group of friends. With a built–in high capacity rechargeable battery to take your music wherever you go with the battery playtime based on the music volume. Loud volume & good bass sound quality; room filling sound, perfect for home, dorm room, kitchen, bathroom, car, parties; streaming music or internet radio services such as Pandora and Spotify. Specification Or Product Features >Frequency response range 100hz-20Khz > Signal-to-noise ratio: 84 db or higher > Sensitivity : 80db + 2db > The output power 3Wx1 > Input power supply: DC5V-1200mAh > Working Voltage 3.0 to 5.5 V > Playing time 180 min. > Charging time 120 min.