["brand new and high quality\nFeatures:\nThe wireless tattoo power supply is made of aluminum alloy material, solid and sturdy to use.\nPortable and lightweight, it is convenient to carry and use. \nWireless design save you more space and reduce danger of stepping on lines.\nTattoo power supply,easy to operate with no lines, you will get the practical tool.\nIt is a great gift for professional tattoo artists and tattoo lovers!\n\nNotice: no using charger higher 5V (all at your own damage)\n\nInstructions:\nFull charge for first use\nPress the five-way switch in the middle: Long press on/off, short press pause/start\nThe top and bottom of the five-way switch are voltage plus and minus (0.5V per voltage adjustment)\nPress right to display the power percentage, and press left to return the voltage interface\nIf power less than 19%, charging lamp will flash: plug in charger and the lamp stay on\n full power, full power display light on\n\nSpecification:\nfor Shell Material: Aluminum alloy\nInput voltage: 5VDC\nOutput voltage: 4.5-12V\nBattery: Lithium-ion battery\nBattery capacity: 1500 mAh\nCharging time: about 5 hours (different chargers have different charging times)\nWorking hours: about 4-6 hours of normal use\nPower conversion rate: greater than or equal to 75%\nColor: Black\nSize:app. 79 x 30mm / 3.11 x 1.18in\nQuantity: 1 pc\n\nNote:\nTransition: 1cm=10mm=0.39inch\nNo retail package.\nPlease allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage includes:\n1 x Wireless Mini Tattoo Power Supply(other accessories demo in the picture is not included.)"]