Metal band, with Soft-Leather Material
Bluetooth Solution: BK 5.0
Operation range: 10m
Speaker diameter: 2 x 40mm
Rated voltage: 20mW (at:1000Hz)
Sensitivity: 103±3dB (at:1000Hz 1mW)
Impedance: 32Ω±15%Ω (at:1000Hz 1mW)
Battery Polymer Li-lon: 300mAh
charging Time: 2.5 hours USB Charging
Play Time: Approx.10 hours
Net Weight of single set: About 150g
Extra 3.5 mm port:Yes