The mast wireless tattoo battery power supply have physics design,small size, light weight and easy to carry.output short circuit protection & Input double charging protection, the charging time of the battery 1200MAH is about 3 hours, and the usage time is about 6 hours.The Wireless Tattoo Power Supply is a LED- Light that provides high and efficient performance. 100% brand new,The package contains 1 pack RCA Wireless Tattoo Machine Power Supply and a USB cable. The wireless tattoo power supply can use about 6 hours depend on personal useage and tattoo machine. And if you have 2 wireless power supply, they are can maintain your tattooing work for a day. Wireless tattoo power supply is made of plastic, good design, small size, light weight and easy to carry around. so you can carry out outdoor tattoo work. It is convenient and the first choice of professional tattoo artists! The Mast Wireless power supply have output short circuit protection & Input double charging protection, more safe in your working.