Product Name Rock Model Number D200 Mono Size(cm) 10*3.5*4.1 cm Net Weight(g) 50 g Material ABS+Silicon Battery Built-in 400 mAh lithium battery Qty/Inner box (pc) 1pc Size/Inner box 10*5.8*4.8 cm Gross Weight(g) 90 g Qty/Carton(pcs) 56 pcs Size/Carton(cm) 43*21*27 cm Weight/Carton(kg) 5.5 kg