Product Specification for Livall Evo21 Cycling Helmet
| Product Weight | 350g Ultralight |
| Dimensions | 33 × 24 × 17 cm |
| Colours | Dark Night, Mint, Snow, Ultraviolet |
| Bluetooth | BLE L.O+BT4.1 |
| Bluetooth Distance | Max. 10m (if no blocks) |
| Speaker | Stereo 2X0.5W |
| Mic | -39dB microphone |
| Tail Lights | Full-color LED taillights & turn indicators |
| Buttons | Start up/power off, volumes, volume- |
| Charging Port | Magnetic USB |
| Electrical Parameter | DC 5V/0.5A |
| Battery Capacity | 3.7V/450mAh (1.665WH) |
| Charging Time | Approx. 3hrs |
| Battery Endurance | Max. 10hrs for lighting, 3-6hrs for music and lighting |