1. Material: ABS, electronic components2. Number of keys: 22 keys3. Bluetooth version: 5.04. Button Technology: X Architecture5. Power supply mode: DC 3.0V6. Working voltage: 3.0V7. Battery capacity: AAA battery x 2 (shipping without battery)8. Ergonomic angle design, the wrist is naturally relaxed, effectively relieve fatigue9. Anti-slip silicone pad design on the back, stable and not easy to slide10. Compatible with various devices11. Product size: 12.3 x 8.5 x 2.2 cm12. Product net weight: 120 grams

http://olla.gr/bt304-22-keys-laptop-mini-wireless-keyboard-spec-2.4g-gray/