Bare metal size: 144* 74.5* 32mm Single package size: 190*105*40mm A single set of product accessories includes: color box, manual, 3 M glue, screws Single set of products: 268g (without batteries) Battery weight: single section 45g double section 90g Dingdong weight: 90g (European and American specifications) Carton size: 430*225*205mm 20 sets/box Gross weight: 6.0KG 20 units/carton Size: 430*225*205mm (without battery and Dingdong) 510*416*235mm (including battery and Dingdong)