Item Type: Silicone Keyboard Material: Silicone Number of Keys: 85 Keys Function: Waterproof, Dustproof and Silent Interface: USB Temperature Range: Temperature Difference Between -40-801Fully Sealed Design: Silicone keyboard is waterproof, dust proof, oil proof, acid proof, and can be used in any harsh environment. 2Lightweight Portable: Soft silicone keyboard can be crimped and stuffed into the bag at will, which is convenient to carry and save space. 3Various Colors: Foldable silicone keyboard has various colors, six colors can be selected, and the key text will never fall off and will not fade. 4Mute Button: The 85 keys silicone keyboard is silent when tapping, which can achieve complete mute without affecting family members' sleep. 5Soft Comfortable: Rollable keyboard has good resilience, soft and comfortable touch, comfortable hand feeling, and protects fingers from injury.1 xSiliconeKeyboard