1. Material: metal, plastic 2. Rated voltage: 12V 3. Rated current: 2.5A 4. Female head: outer diameter 5.5mm, inner cylinder diameter 2.1mm 5. Male head: outer diameter 4.0mm, inner diameter 1.7mm 6. Application: suitable for converting a power supply (charger) with a 5.5x2.1 mm interface into a 4.0 power connector for charging laptops, etc. 7. Features: good transmission effect, stable quality, convenient installation and use, wide applicability, and durability
