Keyboard material: scissor foot membrane keyboard + ABS + PU. Surface technology: high gloss + IML. 2. BT v5.0, chip: Original phase. 3. Sizes: 248*151*8mm. Weight: 246g. 4. Number of keys: 78 keys layout. Lifespan 3mln times. 5. Battery capacity: 500mAh, charging time is about 2.5h. 6. Use time: about 5h in backlight mode, about 30 days when the backlight is turned off. 7. Translucent design + 7 color lighting effects.