We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small rectangular USB to QD adapter in black finish

HP

HP DA85-M USB to QD Adapter 786C8AA telephone accessory

SKU CH-WYSV-NGMVX MPN 786C8AA

Connects a Quick Disconnect headset to a USB port for computer telephony

  • Connects USB devices to QD headsets using the DA85-M adapter
  • HP branded accessory ensures compatibility with HP telephony equipment
  • Part number 786C8AA identifies the exact model for ordering
  • New condition guarantees unused, factory-fresh reliability
  • First listed by the manufacturer in 2026

HP DA85-M USB to QD Adapter

The HP DA85-M is a USB-to-QD adapter that lets you connect a quick-disconnect headset to a computer or desk phone with a USB port. It is designed for office workers, call-centre agents and remote teams who need a simple wired link between a professional headset and their communications device. Part number 786C8AA identifies this specific model from HP Poly.

Plug-and-play installation

The adapter installs without drivers on most operating systems; you simply insert the USB connector and attach the headset’s QD plug. Problems usually arise when the host device does not supply enough bus power or when the headset’s quick-disconnect wiring differs from the adapter’s pin-out, resulting in no audio or a muted microphone.

Check headset and port compatibility

Verify that your headset uses a standard quick-disconnect connector matching the DA85-M interface before ordering. Confirm the computer or phone has an available USB-A port and that its audio settings recognise the adapter as an input and output device. The product was first listed by the manufacturer on 13 March 2026.

How it compares

Measured against everything we stock in Headsets, Cords & Phone Mounts, at today’s prices. Recalculated every night.

Price $65.99
Pricier than about 77% of the 796 comparable items (median $17.99).

Specifications

Product
Brand nameHP
Model nameDA85-M
Part number786C8AA
Size & build
Shipping weight0.23 kg
Package size152 × 102 × 51 mm

Questions about this item

How can I confirm the HP DA85-M 786C8AA adapter is functioning correctly after connecting it?

Connect the adapter to a USB port, attach a compatible QD headset, and verify the headset is recognised in your computer's audio settings and communication software.

What is included with the HP DA85-M 786C8AA adapter and are any extra cables needed?

The package contains the DA85-M adapter unit; no additional cables are required as it connects directly to a USB port and accepts a standard QD headset plug.

Which version of the HP DA85-M USB to QD Adapter should I select for my setup?

The 786C8AA part number identifies the single DA85-M model offered; choose this version to connect a QD headset via USB.

More in Headsets, Cords & Phone Mounts

Similar items