The Stealth brand has been around decades and the latest Galaxy is probably the best value quality wireless pen on the market.
Made from aircraft aluminium and powered by a powerful coreless brushed Japanese Matsu motor of 2000 mAh
Operating at 11000 rpm it will run effortlessly at 4.2-12V
The stroke is available in 3.5mm or 4.2mm.
Needle protrusion Is adjustable from 0- 4.5mm
From flat it will charge in only 3 hours and fully charged will last up to 8hours.
Amazing value and quality.