Technical SpecificationsSignal-to-noise ratio: >80dBBattery type: Lithium-ion Polymer17.28Wh (Equivalent to 3.6V 4800mAh)Battery charge time: 2.5 hours (5V/3A)Music playtime: up to 12 hours (variesby volume level and au-dio content)Bluetooth transmitter power: 0-11dBmBluetooth transmitter frequency range:2.402 2.480GHzBluetooth transmitter modulation:GFSK, /4 DQPSK, 8DPSKDimension (W x D x H):181 x 69 x 74mmWeight: 540g