- RB-T21 Bluetooth Headset Specifications
- Product appearance: Model-RB-T21
- Color: black, white
- Weight: 3.8g
- Bluetooth version: BIuetooth 4.1
- Transmission distance: 10 meters for obstacles
- Frequency response: 50HZ-10KHZ
- Output sensitivity: 99+_3DB
- Microphone sensitivity: _42+_3DB
- Battery capacity: 50MA/H
- Speaker impedance: 16 ohms
- Rated power: 5MW
- drive unit: 6MM
- play time: 3.5H
- Standby time: about 100H
- charging time: about 1.5H
















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