It is an updated version of Mast Tour Pro Machine: Motor--Mast Special brushless motor, power by?Mcore-r1, stronger and powerful red motor. Stroke--4MM. Suitable for all kinds of tattoos. Shell--More lighter than Mast Tour Pro Machine. Weight of 118g and weight with 91mm, the largest diameter is 32mm. Make more comfortable feeling and match-able with the wireless battery. Machine come with RCA connector. When machine is working, the blue light will keep shining.Specifications: Stroke: 4MM Motor: Brushless motor, power by Mcore-r1 Voltage: 5-12V Diameter: 32MM Length: 91MM Weight: 118G Jack: RCA