Beautiful sound without boundaries • Great pop-up design • Expanded bass resonance chamber • New,larger 40mm drivers precise high for superb sound clarity • Power: 3W max • Battery Charging Voltage: 5V • Charger Time:3 hours max • Last Time: 4hours (via bluetooth to play) • Last Time: 5hours (via audio cable to play) • Driver Unit:40mm, 4 Ohm ,3W • Power Indicator Light: Blue lights •