• 5 hours playback • time cool color options • Loudspeaker: 43 x 47 mm • output power: 4.2 W RMS • Frequency response: 110 Hz to 20 kHz • Signal-to-noise ratio: 85 dB • Battery type: Lithium-ion polymer 2.7 Wh • Battery charging duration: 2.5 hours (5 V/1 A) • Music playback time: Up to 5 hours • (depending on volume and audio data) • Bluetooth® version: 5.1 • Bluetooth® profile: A2DP 1.3, AVRCP 1.6 • Bluetooth® transmission frequency range: 2402−2480 MHz • Bluetooth® transmission modulation: • GFSK, π/4 DQPSK, 8DPSK • Dimensions (W x H x D): 87.5 x 75 x 41.3 mm • Weight: 0.209 kg.