Features:
* Bluetooth 4.1 technology minimizes sound loss with stable transmit efficency， and provides barrier-free 10M transmission distance with stable signal.
* Sophisiticated noise reduction with double filter provides crystal clear sound.
* Smart voise prompt helps you know the working status of your headset.
* It support the simultaneous connection of two phones， and answer the phone from either one.
* Battery display， you can view the battery status of the headset on your phone.
* 55mAh battery capacity， 80h standby time， 4h talking time and 3.5 music time.
* The light earphone with premium silicone earhook allows you to wear it comfortably and securely.
Specifications:
| General Specification | |
| Brand | ROCK |
| Model | RAU0547 |
| Color | Red， Black， Yellow |
| Wearing Type | In-ear |
| Net Weight (g) | 7g |
| Dimensions (cm/ inch) | 6*1.5*1CM |
| Technical Parameters | |
| Microphone | Yes |
| Wired Control | Not support |
| Bluetooth Version | 4.1 |
| Transmission Distance | 10M |
| Rated Power | 5mW |
| Receive Sensitivity | 110dB |
| Impedance | 16Ω |
| Frequency Response | 50-10kHz |
| Battery Capacity | 55mAh |
| Charging Time (h) | Approx. 2h |
| Taking Time | Approx. 4h |
| Working Time (h) | Approx. 3.5h |
| Standby Time (h) | Approx. 80h |
Package Included:
1* ROCK D200 Bluetooth Earphone
1* pair of earmuffs