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World Trading Site
2023 Newest K21 Bluetooth Headset Wireless Headphones Dual Mic Noise Cancelling Earphones With Charging Box For All Smart Phones
$31.83 – $41.64Price range: $31.83 through $41.64
[Bluetooth 5.3] Adopting Bluetooth 5.3, the transmission of AIRERSI headset K21 is faster, more efficient and stable. You can move freely with up to a 59 ft (18 m) range. Headset features multipoint technology, enjoy the convenience of having up to two devices connected at once.
[CVC8.0 Dual Mic Noise Cancelling] AIRERSI K21 bluetooth headset features dual mic CVC8.0 and ENC noise cancelling technology, knock out 96% noise and deliver clear voice. Enjoy clear calls.
[Echo Cancelling & Clear Voice] AIRERSI Bluetooth headset K21 adopts Echo Cancelling and Consistent Voice Quality technology for clearer calls. Consistent Voice Quality technology conceals Packet-loss and bit error effectively to ensure consistent voice quality even in situations where bluetooth connectivity may be compromised. Hope you enjoy consistent clear call.
[Comfort-Test Design] Rigorously tested for stability and comfort on a wide range of ear shapes means you’ll feel just as comfortable during your first call as your last call. 3 pieces different sizes ear tips to meet your need. Only 0.04lbs / 20g,sleek and pocket-size, K21 headset is perfect for on-the-go communication.
[Long Battery Life] Equipped with a 150mAh battery, allows you to talk freely throughout the day. With up to 16 -18hours of continuous talking on a 1.5 hours single charge. Equipped with a 600mAh charging box, it can provide 4-5 charges for the headphones,K21 Bluetooth Headset works with iPhone, Androidand and all smart phones.












| Weight | 9 kg |
|---|---|
| Dimensions | 4 cm |
| Brand Name | AIRERSI |
| Style | Ear Hook |
| Vocalism Principle | Hybrid technology |
| Origin | Mainland China |
| Active Noise-Cancellation | Yes |
| Material | Silica GEL |
| Control Button | Yes |
| Communication | WireLess |
| Volume Control | Yes |
| Category | Earphones & Headphones |
| Certification | CE |
| Number Of Drivers | 2 |
| Plug Type | none |
| Impedance Range | up to 32 Ω |
| Headphone Pads Material | Silicone |
| Sound Isolating | YES |
| Support Memory Card | No |
| Waterproof | Yes |
| Frequency Response Range | 20 – 22000 |
| Magnet Type | Neodymium |
| Voice assistant built-in | YES |
| Wireless Type | bluetooth |
| Line Length | 0 |
| Package List | Replaceable Pads Set |
| Height[mm] | 17 |
| Width[mm] | 58 |
| Codecs | Apt-X HD |
| Driver Diameter | 10 |
| Resistance | 16 |
| Depth[mm] | 90 |
| Sensitivity | 120 |
| Is wireless | Yes |
| Weight[g] | 20 |
| NFC Technology | no |
| Connectors | USB |
| Earcups Type | Semi-open |
| Bluetooth Version | 5.3 |
| Battery life up to[hours] | 240 |
| Total Harmonic Distortion | 1 |
| Charging Method | Charging case |
| Max Output | 150 |
| Support APP | Yes |
| Function | For Study |
| Battery Capacity[mAh] | 150 |
| Maximum wireless range[m] | 10m-20m |
| With Microphone | Yes |
| Features | Google Assistant Support |
| Choice | yes |
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