Key specifications Product dimensions: approx 170 x 84 x 62 mm / 66.93 x 33.07 x 24.41 inches Weight: about 230 grams without battery (for case + motherboard + spring basket + lens + lanyard) Cell: 18650 type flat for head battery x 21 welding T21 with light: output/input power 5V2.1A Benefits and features Portable and compact design Lightweight construction and small footprint make it easy to handle and store in a toolkit or bag. Clear power compatibility Uses standard 18650 flattype cells, enabling flexible power options for the head battery setup. Integrated lighting for visibility T21 with light provides illumination during precision tasks, improving accuracy in low light environments. Readytouse assembly components Includes case, motherboard, spring basket, lens, and lanyard components for quick setup and use. What makes this product stand out Precise dimensions and weight are specified for planning space and portability. The combination of a head battery configuration with 21 welding and a builtin light supports both functionality and onsite usability. USBstyle 5V2.1A power specification for convenient power input/output with compatible devices. Recommended use scenarios Electronics assembly and in tight spaces where visibility and space are limited The compact size and integrated light help technicians work accurately without bulky equipment. Field service and maintenance Portable setup with head battery configuration and a reliable light source for onsite tasks. Camera or lens alignment and microassembly tasks The combination of a protective case and precise components supports careful alignment and assembly work, with illumination to improve focus and accuracy.