
● Maximum Devices: better within 50 Devices.
● Ceiling mounted/wall mounted.
● Support POE 802.3at.
● 1*gigabit LAN port.
● Ceiling mounted/wall mounted.
● Support POE 802.3at.
● 1*gigabit LAN port.

● 20 physical keys each with a dual color LEDs.
● Rich visual experience with 480x272 color graphic LCD.
● 2 independent control keys are used for fast switch pages.
● Multi-adjustable angles.
● Support multi-expansion modules for an attendant console application.
● Support custom upload contact photo.
● Rich visual experience with 480x272 color graphic LCD.
● 2 independent control keys are used for fast switch pages.
● Multi-adjustable angles.
● Support multi-expansion modules for an attendant console application.
● Support custom upload contact photo.

● 32 programmable keys each with a three-color LEDs.
● BLF,Speed dial,Conference, Call waiting, DND.
● Expansion module is powered by the host phone.
● Daisy-chain 6 modules for 192 programmable keys.
● Applies to ES620, ES410, ES330 IP Phone.
● BLF,Speed dial,Conference, Call waiting, DND.
● Expansion module is powered by the host phone.
● Daisy-chain 6 modules for 192 programmable keys.
● Applies to ES620, ES410, ES330 IP Phone.

● Bluetooth and EHS Wireless Headset to one adapter module.
● Answer / Terminate Calls Through Bluetooh / EHS wireless Headset.
● Adjust call volume through Bluetooth headset.
● USB Charging.
● Answer / Terminate Calls Through Bluetooh / EHS wireless Headset.
● Adjust call volume through Bluetooth headset.
● USB Charging.

● Durable and flexible hose boom is easy to adjust.
● Extra noise cancelling microphone effectively reduces surrounding noise, making your voice heard clearly.
● Anti-static shock Microphone provides protection for hearing health.
● Click-stop headband for superior fit and comfort.
● Durable and flexible hose boom is easy to adjust.
● Extra noise cancelling microphone effectively reduces surrounding noise, making your voice heard clearly.
● Anti-static shock Microphone provides protection for hearing health.
● Click-stop headband for superior fit and comfort.
● Durable and flexible hose boom is easy to adjust.