USB rechargeable design with built in battery eliminates frequent battery changes, featuring fast charging through standard USB port for uninterrupted counting tasks in busy work environments Lightweight construction comfortable wearing compared to metal alternatives, suitable for mobile users like outdoor activity coordinators conducting field surveys High sensitivity manual button provide, solving missed count issues in traditional counters for laboratory research and sports event statistics Ergonomic rings shaped allows handsfree operate and comfortable all day wear, ideal for warehouse staff and inventory auditors requiring continuous counting functionality Backlit digital display ensures clear visibility of counting data in low light conditions, perfect for night workers or evening event organizers needing visibility, Manufacturer: YROHGKPN