Wireless Bluetooth V4.1 Sunglasses Headset Smart Glasses With Speaker
Features:
- Longest wireless range: 10meters
- Noise-signal ratio: 15 decibel resolution
- Frequency:2.4GHz2.4835GHz
- Talk time: 6 hours
- Stand-by time: 120 hours
- Receiver sensitivity: 0DBM(degree:11
- Encryption length: 128bits
- Charging time: 3 hours
- Certificate Authentication:CE,FCC
- Storage temperature:-20~60degrees