Rapoo E9050L Tri-mode Bluetooth Wireless Keyboard Silent Laptop 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 240-260h 6. Battery capacity: 500mAh 7. Size: about 28.4 x 11.9 x 1.3cm 8. Weight: about 292g 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. About 5.3mm body, frame and back panel are made of aluminum alloy, rounded edges, delicate texture, wear-resistant and anti-oxidation 6. Scissor foot structure, spherical concave and convex button design, can accurately fit the fingertips, make the tapping more even and light, rebound faster, improve the stability of the button, and reduce the sound 7. Low-power chip, built-in 500mAh lithium battery, charged by Type-C cable, about 3 hours to fully charge, full charge wireless 2.4G continuous use battery life about 240 hours, full charge Bluetooth continuous use battery life about 260 hours