... wireless bluetooth keyboard with leather case for ipad wireless bluetooth keyboard with leather case for ipadwireless bluetooth keyboard for ... . Use silicone material on baseboard and baseboard of leather case is for waterproof ,dustproof, shock absorption Specifications 1, ... 17, key strength: 80 ± 10g 18, key life: 500 million 19, operating temperature: -20 - +55 °C 20, Storage temperature: -40 ...