K6 19 Key Mini Wireless Bluetooth Digital Keyboard Suspended Mechanical Universal Keypad 4.0 1. Material: ABS 2. Key number: 19 keys 3. Key technology: crater architecture 4. Connection method: Bluetooth connection 5. Power supply: 1 AAA (not included) 6. Working distance: about 10 m 7. Weight: about 97 g 8. Dimensions: about 13.3 x 9.7 x 2.7 cm Features: 1. Bluetooth connection, long-distance wireless transmission, stable and unbound data, fast response speed 2. Crater button design, conform to the shape of the finger, input feel comfortable, suitable for blind typing, crisp, quick rebound 3. With backspace key, enhance work efficiency, input, correction more convenient 4. Anti-skid silicone feet, stable but not floating, intimate and easy to use, reduce the chance of pressing the wrong one 5. Splash-proof design, when removing the key-caps, no water can enter 6. Compact and portable, thin and lightweight, easy to store, space-saving, is a good companion for business trips 7. Three system compatibility, the keypad digital input independent operation, no conflict with the computers own keyboard, compatible with a variety of operating systems, without the need to install the driver