Material: Aluminium alloy and high quality insulating plastic.Interface: RCA interfaceBattery Capacity: Long battery: 2400mAh Short battery: 1650mAhCharging Time: About 2 hoursOperation Time: Under normal 8V voltage, the long battery voltage stable state can last for more than 7 hours,the short battery voltage stable state can last for more than 3 hours,long time working the voltage is stableOutput Fixed Current：2AWorking Voltage: 3.7VCharging Voltage: DC 5V±0.5V 1000mAhOutput Voltage: 5-12VLED Display Content: Output voltage range + battery usageInstructions for Use:Power ON/OFF: Long press "O" key for 3 secondsOutput Pause / Resume: Short press "O" key to pause the output, and short press it again to resume the output (the resume voltage is the working voltage before the pause).Adjust Output Voltage: Press the "+" or"-" key to adjust output voltage. LED display shows 5-12V, each adjustment ±0.1V, when you long press the voltage adjustment buttons, the voltage will change by 0.5V each time.Power: The LED display will show the remaining power, and the full power will display 4 divisions. Fast charging through the matching fast-charging USB data cable can usually be fully charged about 2 hours. Please pay attention to the cha

FAQ:“What's the Running time?”Up to 10+ hours (depending on your voltage use and machine’s motor).“Charging time?”1.5 hours.“Weight?”95 gram2.5 oz.“Voltage range?”5 - 12v.“Dimensions?”Height: 53mm.Diameter: 33mm.“What’s the incremental voltage?”0.1.“What machines is it compatible with?”Any pen-style rotary machine with an RCA connection