Grandstream GBX20 backlit LCD extension module headset Up to 150 m IR

Up to 150 m IR distance

SEC (Smart Environmental Control) - Advanced digital signal processing and 3D optics

giving your devices access to the latest dual-band Wi-Fi router for faster speed and extended range

Unlocks door by face recognition；

Grandstream GBX20 backlit LCD extension module headset Up to 150 m IRGrandstream GBX20 backlit LCD extension module with 4. 3 inch (272x480) TFT color LCD, 20 per page (each module contains 2 pages, for up to 40 lines per module), Combine up 4 daisy chained modules for 160 contacts extensions, BLF, call park pick up, speed dial, presence, intercom, voice conferencing transfer forward and more