Peak Solice Mini Wireless Pen Tattoo Machine — BlackPerform at your best with the lightweight, compact Solice Mini by Peak. This wireless machine gives you up to 10 hours of performance power on a single charge. Its slim, compact design also reduces hand and wrist fatigue for better focus on your work and optimal comfort. Details: Net Weight: 5. 6oz with PowerPack Machine Length: 4 with PowerPack; 2. 5 without PowerPack 4mm stroke length Machine runs on a brushless motor Voltage Range: 4v12v voltage