TW YX2 Hat Bluetooth Speaker Adjustable Wireless Smart Hat Speaker for Outdoor Sports Gift

1. Wireless transmission distance: 10M
2. Battery capacity: 200mA
3. Frequency range: 20-20KHZ
4. Sensitivity: 90 DB
5. Impedance: 8 Ω 
6. Speaker size: 40mm 1W
7. Charging time: 2 hours
8. Calling time: 4-5H
9. Bluetooth music time: 3-4H (70% volume)
black/grey/navy blue
Forehead fabric: acrylic/29*24*13cm
Weight 161g
54*41.5*31CM=50/carton

50/box=9KG