<p>1. Material: ABS</p> <p>2. Key number: 19 keys</p> <p>3. Key technology: crater architecture</p> <p>4. Connection method: Bluetooth connection</p> <p>5. Power supply: 1 AAA (not included)</p> <p>6. Working distance: about 10 m</p> <p>7. Weight: about 97 g</p> <p>8. Dimensions: about 13.3 x 9.7 x 2.7 cm</p> <p></p> <p>Features:</p> <p>1. Bluetooth connection, long-distance wireless transmission, stable and unbound data, fast response speed</p> <p>2. Crater button design, conform to the shape of the finger, input feel comfortable, suitable for blind typing, crisp, quick rebound</p> <p>3. With backspace key, enhance work efficiency, input, correction more convenient</p> <p>4. Anti-skid silicone feet, stable but not floating, intimate and easy to use, reduce the chance of pressing the wrong one</p> <p>5. Splash-proof design, when removing the key-caps, no water can enter</p> <p>6. Compact and portable, thin and lightweight, easy to store, space-saving, is a good companion for business trips</p> <p>7. Three system compatibility, the keypad digital input independent operation, no conflict with the computer's own keyboard, compatible with a variety of operating systems, without the need to install the driver</p>