Rapoo E9000G Wireless Bluetooth Keyboard Computer Laptop Cell Phone Keyboard 1. Connection mode: Bluetooth 5.0, 4.0 and wireless 2.4G 2. Number of keys: 78 keys 3. Key travel: 1.5mm 4. Key life: 5 million times 5. Battery life: about 12 months 6. Power supply: 2 AAA batteries (not included) 7. Size: about 28.4 x 11.9 x 2cm 8. Weight: about 240g Features: 1. Supports three connection modes: Bluetooth 4.0, Bluetooth 5.0 and wireless 2.4G, more stable connection signal, compatible with multi-system operation 2. Multitasking of desktops, laptops, tablets and other devices is easy and convenient, and up to 4 devices can be connected 3. Quick switching between Bluetooth and receiver mode (2.4G mode), switch by toggling the mode switch 4. 78-key compact key layout, travel and reduce space 5. The body is about 3.9mm, and the back panel is made of anodized aluminum alloy, with rounded edges, delicate texture, wear resistance and oxidation resistance 6. The scissor foot structure and spherical concave and convex button design can accurately fit the fingertips, making the tapping more even and light, rebounding faster, improving the stability of the buttons and reducing the noise 7. There is a USB receiver storage compartment at the bottom to avoid the trouble of easy loss