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 black USB dongle with matte finish

POLY

POLY 85T33AA#ABA Savi D400 DECT 1920-1930 MHz USB adapter

SKU CH-XPMH-FK5VM MPN 85T33AA#ABA

USB DECT dongle operating at 1920-1930 MHz connects compatible Savi headsets to a computer

  • DECT 1920-1930 MHz band for secure wireless calls
  • USB dongle connects compatible Poly Savi headsets to PC
  • Works with Savi 8240-M, 8220-M, 7310-M and 8210 UC models
  • Compact adapter enables cordless freedom at the desk
  • New POLY 85T33AA#ABA part ready for unified communications

Poly Savi D400 DECT Dongle

The Poly Savi D400 DECT dongle operates in the 1920-1930 MHz band and connects via USB. It provides the wireless link for compatible Poly Savi headsets in unified communications environments. Office workers and call-centre agents gain cordless freedom without Bluetooth pairing steps.

Savi 8240-M 8220-M 7310-M 8210 UC Headset Support

The adapter is validated for the Savi 8240-M, Savi 8220-M, Savi 7310-M and Savi 8210 UC headset models. Plugging the dongle into a host device enables instant recognition and call-control features for these specific headsets. Other headset families will not pair with this dongle.

1920-1930 MHz DECT Range and Density

The DECT 1920-1930 MHz frequency delivers stable audio across typical office floors. High-density deployments can run many simultaneous links before co-channel contention appears. Very large open-plan spaces or buildings with heavy RF shielding may exceed the practical device count.

Highlights

  • DECT 1920-1930 MHz band for secure wireless calls
  • USB dongle connects compatible Poly Savi headsets to PC
  • Works with Savi 8240-M, 8220-M, 7310-M and 8210 UC models
  • Compact adapter enables cordless freedom at the desk
  • New POLY 85T33AA#ABA part ready for unified communications

Specifications

BrandPoly
Model85T33AA#ABA
Part Number85T33AA#ABA
Shipping weight0.45 kg
Package size145 × 89 × 51 mm

Questions about this item

Will the DECT 1920-1930 MHz USB dongle itself need firmware updates or physical replacement over time?

The dongle is a solid-state USB adapter with no moving parts; firmware updates are delivered through the Poly headset management software when the paired Savi 8210 UC, 8220-M, 8240-M or 7310-M headset is connected.

What range limit appears first when the adapter runs continuously in a busy office?

The DECT 1920-1930 MHz band supports dense deployments, but the practical limit is the number of simultaneous active Savi headsets the single dongle can pair with, which is defined by the headset model specifications.

How much heat or fan noise does the USB adapter generate during all-day use?

The adapter draws power only from the USB port, has no fan and runs cool enough that surface temperature remains barely above ambient even after hours of continuous DECT 1920-1930 MHz operation.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.