MAST A2 Wireless Tattoo Pen Machine Kit With 5000mAh Extra Large Battery Capacity* Powerful brushless motor has been proven in the audience. Equipped with 5000mAh extra larger battery which can last 15 hours, worry-free and smooth completion of your work.*MAST A2 is compatible with all standard cartridges, compatible all more choices. We listen to artists and constantly optimize to meet their professional needs. We work for the artist for an unrivaled creative experience. * Equipped with simple operating system:- Double-click timing display- Do