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| Technical details | |
| Package weight | 700 g |
| Wall mountable |  |
| Phonebook capacity | 40 entries |
| Caller ID |  |
| Weight & dimensions | |
| Weight | 360 g |
| Height | 210 mm |
| Width | 124 mm |
| Depth | 33.5 mm |
| Colour | |
| Product colour | Grey |
| EAN | 6947273702931 |
| Warranty | 1 year |
| Source: Icecat.biz | |
The GBX20 is a backlit LCD extension module supported by the GXV3350 and GRP2615. The module includes 20 dual-colored extension keys and 2 arrow keys for page switching (allowing each GBX20 to support up to 40 contacts/extensions.). Connect up to 4 GBX20 modules to compatible Grandstream phones for a total of 160 contacts/extensions.
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The above technical details are for reference only and may change without notice. We reserve the right to correct printing errors and use illustrations for guidance. Some text may be auto-generated or machine-translated, which could lead to inaccuracies.