Advantage: All our products are fully tested for safety and quality High quality. Colour: Black Material: metal + PCB no battery cell Packing list: 1 x Plastic Case 1 x Spring 1 x Circuit Board(PCB) Warning: Do not disassemble or insert in charger if battery is cracked or damaged. Use only with batteries always use proper eye and respiratory protection. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.