| | Bluetooth Speakers:GM-991B |
| Device type | Bluetooth portable speaker |
| Power, W | 5 W |
| Frequency response | 90 Hz - 20 kHz |
| Audio Sources | Bluetooth, micro SD, AUX -ø 3,5mm |
| Signal / noise ratio | > 65 dB |
| Number of channels | |
| Speaker | 1x50mm, 4 Ohm |
| Subwoofer | Passive |
| Bluetooth | V2.1+EDR; A2DP, AVRCP, HFP |
| USB | |
| microUSB | |
| Wi-Fi Direct | |
| Composite Output | |
| NFC | |
| Number of Audio Input | |
| Headphone jack | |
| Built-in MP3 player | Yes |
| Support for Handsfree | Yes |
| Screen | |
| FM radio | |
| Alarm clock | |
| Additionally | |
| Battery | Li-Ion - 3,7 В, 900мАч |
| Operation duration | 8 hours |
| Charge time | 3 hours |
| Adapter | microUSB charging 5V / 0.5 A (not supplied) |
| Operating Power Consumption | |
| Stand-by Power Consumption | |
| Color | Black |
| Package Contents | Speaker, MicroUSB cable, AUX cable, Manual/Warranty |
| Length, mm | 75 |
| Width, mm | 78 |
| Height, mm | 71 |
| Weight, gr | 255 |
| Type of packaging | transparent box |
| Unit number per packing | 1 |
| Length of package, cm | 9 |
| Width of package, cm | 9,4 |
| Height of package, cm | 13,3 |
| Weight of package, gr | 340 |
| EAN13: | 4891614100912 |
| Quantity of consumer packages, pcs | 20 |
| Length of the box, cm | 47 |
| Width of the box, cm | 20,2 |
| Height of the box, cm | 28 |
| Gross Weight, kg | 7,3 |
| Net Weight, kg | 6,3 |
| ITF14: | |