Features:
1. Intelligent voice prompt to informs you the condition of the earphone， you could say "YES" to answer the phone， or say "NO" to reject the phone while driving， running.
2. Support the simultaneous connection of two bluetooth devices.
3. 1080P stereo effect， CVC 6.0 noise reduction， APT-X high-fidelity audio technology， low-latency.
4. Bluetooth 4.1 version， built-in 80MIPS Kalimba DSP core， to realize low-power consumptiom.
5. Power display. Click the button on the side， the light would light up to show the remaining battery power.
6. Suitable wearing for both side of your ear.
Specifications:
| General Specification | |
| Brand | RIKYA |
| Model | K21 |
| Color | Black， White |
| Wearing Type | Ear-hook |
| Dimensions (cm/ inch) | 6.1*1.8CM |
| Technical Parameters | |
| Microphone | Yes |
| Wired Control | Not support |
| Bluetooth Version | 4.1 |
| Transmission Distance | 10M |
| Rated Power | mW |
| Receive Sensitivity | dB |
| Impedance | Ω |
| Frequency Response | Hz |
| Battery Capacity | 260mAh |
| Charging Time (h) | 2h |
| Taking Time | 26h |
| Working Time (h) | 16h |
| Standby Time (h) | Approx 45 days |
Package Included:
 | 1* Bluetooth Earphone |
| 1* USB charging cable | |
| 1* pair of earhooks | |
| 2* pairs of earmuffs |