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HP 685 Comfort Dual-Mode Keyboard wireless black low-profile design

HP

HP 8T6L9UT#ABA 685 Comfort Dual-Mode Keyboard

SKU CH-645E-ER722 MPN 8T6L9UT#ABA

Wireless keyboard with Bluetooth and 2.4 GHz USB connectivity, 32.81 ft range, and dedicated Copilot, dictation, and language-switch keys for Windows 10, 11, macOS, and ChromeOS

  • TypeKeyboards & Keypads
  • Wireless freedom up to 32.81 ft range
  • Dual-mode Bluetooth and 2.40 GHz RF connectivity
  • Dedicated Dictation, Language Switch and CoPilot hot keys
  • Works with Windows 10, Windows 11, macOS and ChromeOS
  • Simple USB Type-A receiver for instant setup

What this keyboard is and who it suits

The HP 685 Comfort Dual-Mode Keyboard is a wireless input device designed for office and home use. It connects via Bluetooth or 2.40 GHz radio to PCs and Macs running Windows 10, Windows 11, macOS or ChromeOS. Dedicated keys for dictation, language switching and CoPilot provide quick access to common software functions. This model suits users who want a single keyboard for multiple operating systems.

Build quality and daily connectivity

The keyboard uses a USB Type-A receiver for the 2.40 GHz link and also pairs over Bluetooth, giving a wireless range of 32.81 ft. Dual-mode operation lets you switch between a desktop dongle and a laptop or tablet without re-pairing. The layout includes the extra hot keys for modern OS features, so everyday tasks such as voice input or AI assistance are one press away. No cables are required once the receiver is inserted.

The spec that decides fit

The deciding factor is the dual wireless interface: both 2.40 GHz and Bluetooth must be supported by your devices. If your workstation only has USB-C ports and no adapter, the Type-A receiver will not fit. Buyers who need a wired-only keyboard or a different key layout should look elsewhere.

Highlights

  • Wireless freedom up to 32.81 ft range
  • Dual-mode Bluetooth and 2.40 GHz RF connectivity
  • Dedicated Dictation, Language Switch and CoPilot hot keys
  • Works with Windows 10, Windows 11, macOS and ChromeOS
  • Simple USB Type-A receiver for instant setup

Specifications

BrandHP
TypeKeyboards & Keypads
Shipping weight1.25 kg
Package size472 × 254 × 51 mm

Questions about this item

What dual wireless modes does the 685 Comfort keyboard use and what is the maximum range?

It connects via 2.40 GHz RF and Bluetooth, with a rated range of 32.81 ft for both modes.

Which USB port type is required for the 2.4 GHz receiver on this keyboard?

The included receiver plugs into a standard USB Type A port on the host device.

How do you pair the keyboard over Bluetooth and what is the common mistake?

Hold the Bluetooth key until the LED flashes, then add the device in OS settings; the common mistake is skipping the LED flash step.

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