Sodo MH2 2 in 1 Bluetooth Heaphone Twist Out Speaker – Black

Bluetooth version:4.2 output power: 3w * 2 speaker: 40f, 4o/3w battery capacity: 350mah input power: dc5v 500ma max consume current: 500ma frequency response: 90hz-18khz sensitivity: -58db signal to noise ratio: ?70db the distortion degree: ?0.3% working time: headphone mode: about 6 hours speaker mode: about 3 hours standby time: 23 hours