| | Headphone:GM-251BT |
| Device type | Bluetooth earphones / headsets |
| Сompatibility | iPhone, iPod, iPad, MacBook, Samsung, HTC, Nokia, LG and other smart phones, tablets, music players and audio |
| Frequency response | 20 - 20000 Hz |
| Impedance | 32 Om (+/-15%) |
| Sound pressure level (SPL) | 115 dB (+/-5 dB) (SPL) |
| Load rating | |
| THD, total harmonic distortion | |
| Ear coupling | monitor (ON ear) |
| Design of headphones | |
| Mount Type | magnetic fastening |
| Transducer principle | dynamic |
| Headphone connectivity | Bluetooth V4.2 |
| Noise Isolation | |
| Active noise control system | |
| Audio Cable | |
| Driver Diameter, mm | 10 |
| Built-in microphone | yes |
| Features | Lithium polymer battery 60mAh |
| User Manual / Warranty Card | yes |
| Additionally | replaceable ear pads - 2 pairs |
| Carrying case | |
| Dual mono connector 3.5mm jack | |
| Connector 1/4' (6,35 mm) jack | |
| Answer/end a conversation | yes |
| Play/Pause | yes |
| Previous/next track | yes |
| Adjusting the volume | yes |
| Height, mm | |
| EAN13: | 4892356100918 |
| Width, mm | |
| Depth, mm | |
| Net weight, gr | 18 |
| Type of packaging | Box |
| Packing height, mm | |
| Packing width, mm | |
| Packing depth, mm | |
| Package gross weight, gr | |
| ITF14: | |
| Quantity of consumer packages, pcs | 100 |
| Height of the box, cm | 34 |
| Width of the box, cm | 33 |
| Box depth, cm | 45 |
| Box gross weight, kg | |
| Net weight of the box, kg | |