Model item: pop Material:zinc alloy+nylon Color: silver Communication system: bluetooth v4.0 Compatible system: upon android 4.3/ upon ios7.0 System supported: bluetooth hid Efficient distance: up to 10-30m Battery cell: cr2032 Dimensions:f39.6x11.8mm / f36.2 x11.8mm Weight: 63g / 58g Trade term: fob shenzhen Below packing details for your reference, Pop watch: 40pcs/ctn Carton size: 34x 22.5 x 44.5cm N.W: 4.6kg G.W: 5.6kg Volume weight: 7kg -