Material:ABS/hardware/PCBABattery voltage: 7.4VBattery capacity: 4000mAh (2 series circuit)Battery power:29.6WCharging voltage: 5VCharging current: 2000mA (+20%)Motor speed: DC8.4V / 130000 RWorking power: ≤200W MaxProduct size: 40*69 141mmProduct weight: 280 gExecutive standard: GB4706.1-2005GB4706.27-2008Inspection: Qualified product