The love for music and the desire to create a world-class music experience prompted Dr. SIDNEY HARMAN to found HARMAN/KADON more than 60 years ago, a world-renowned audio brand that combines art and technology. From home theaters to car audios that are popular around the world, Nowadays, HARMAN/KARDON, the popular multimedia speaker, has shown the world a trend-leading audio-visual experience with its extremely creative design, superb artistic taste and free and innovative design concepts. Bluetooth version:4.2 Support: A2DP1.3, AVRCP1.5, HFP1.6 Transducer: 1.75 inches full frequency*1 Rated power: 8WRMS Frequency response:130HZ-20KHZ(-6DB) Signal-to-noise ratio: 80DB Charging input: 5V1A Battery type: Physiopolymer (3.8V, 2200MAH) Battery charging time: 3 hours Music playback time: 10 hours (varies depending on volume and audio content) USB power supply: 5V1A BLUETOOTH transmitter power:0-9DBM BLUETOOTH transmitter frequency range: 2402GHZ-2480GHZ#BLUETOOTH transmitter modulation: GFSK, T/4 DQPSK, 8DPSK. Dimensions (height x width x depth): 75.20X140X26.10MM Weight:250.5G