| Warranty | 24 |
| Gross weight | 0.063 |
| Net weight | 0.019 |
| Colour of product | Black |
| Frequency range | 50-18.000 |
| Bluetooth version | 4.2 |
| Battery type | Built-in rechargeable lithium-ion battery |
| Wireless connection | Yes |
| Other features | •In-Line Microphone & Remote (Play/Pause, Start/Stop, Volume, Answer/End, etc.) •Pivoting ear-clip creates the perfect fit and seal •Sweat Resistant •Cable Management Clip |
| Battery life | 6+ |
| Producer product name | BT221i |
| Producer product family | Headphones |
| Microphone | Yes |
| Headphones connection type | Wireless |
| Wearing style | In-ear |
| Wireless | Yes |
| USB charging port | No |
| Noise canceling | No |
| Gross depth (mm) | 67 |
| Gross height (mm) | 180 |
| Gross width (mm) | 26 |
| Packing quantity | 6 |
| Tare weight (kg) | 0.044 |
| Volume (m3) | 0.00031356 |
| Embeeded battery | Yes |
| WEEE tax | Yes |
| Plastic (No PET) | 44 |
| TI weight (kg) | 0.002 |
| WEE classification | CL109:5:2017-04-01 |
| Composition of battery | CL127:KT:2016-12-09 |
| Classification of battery | CL126:NE:2016-12-09 |
| Type of battery | Accumulator |
| Connector type | Bluetooth |
| Gross depth master carton | 143 |
| Gross width master carton | 88 |
| Gross height master carton | 185 |
| Net weight master carton | 0.378 |
| Tare weight master carton | 0.023 |
| Palette Qty | 4452 |
| Producer | Koss |