Model: X-11. 

Bluetooth version: 5.3. 

Battery capacity: 1000 mAh (built-in). 

Working time (continuous playback): up to ~40 hours. 

Standby time: up to 240 hours (in some specs) or 720 hours (in manual). 

Transmission (Bluetooth) distance: up to ~10 meters

Interface: USB Type-C for charging and audio interface. 

Waterproof rating: IP67 (some listings) or IPX6 in manual. 

Additional features: 40 mm speakers (in some listings), tri-color ambient lighting, dual phone connection (in some listings). 

Applicable helmet type: Universal (fits most helmets) according to listing.