General Specifications Bluetooth version 4.1 Support A2DP V1.2, AVRCP V1.5 HFP V1.5, HSP V1.2 Transducer 1 x 40mm Output power 3.0W Frequency response 180Hz – 20kHz Signal-to-noise ratio ≥80dB Battery type Lithium-ion polymer (3.7V, 730mAh) Battery charge time 2.5 hours Music playing time up to 5 hours (varies by volume level and audio content) Dimensions (H x W x D) 71.2 x 86.0 x 31.6 (mm) Weight 184g Bluetooth transmitter power 0-4dBm Bluetooth transmitter frequency 2.402-2.480GHz Bluetooth transmitter modulation GFSK/DQPSK/8DPSK