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 square Bluetooth 5.0 adapter with 3.5mm and Micro USB ports

VR-robot KN321 Bluetooth 5.0 Audio Transmitter Receiver Adapter

SKU CH-ZNJK-09D51

A 2-in-1 Bluetooth 5.0 adapter switches between transmitter and receiver modes to stream audio wirelessly over 3.5 mm connections

  • Channels2
  • ConnectorsMicro USB, 3.5mm
  • Remote Controlfalse
  • Dimensions & Weight1.73 in x 1.73 in x 0.47 in
  • 2-in-1 transmitter and receiver switches with a simple flick
  • Bluetooth 5.0 delivers stable wireless audio up to 33 ft
  • Built-in 200 mAh battery provides up to 6 hours playback
  • Plug-and-play via 3.5 mm cable with no driver required
  • Compact 1.73 in square design fits in any bag

Compact 2-in-1 Bluetooth 5.0 Adapter

The VR-robot KN321 is a pocket-sized Bluetooth 5.0 audio transmitter and receiver. It adds wireless streaming to wired speakers, headphones, TVs or car stereos via a 3.5 mm connection. The built-in 200 mAh battery provides up to six hours of cable-free operation.

Fits Any 3.5 mm Source or Sink

A sliding switch selects transmitter or receiver mode without software. In transmitter mode it sends audio from a non-Bluetooth TV, CD player or PC to Bluetooth headphones or speakers. In receiver mode it pulls audio from a phone or tablet to wired gear. The package includes a 3.5 mm cable and a 3.5 mm to 2-RCA cable for broader compatibility.

Streams Up to 10 m with aptX Low Latency

Bluetooth 5.0 delivers a stable link up to 10 metres or 33 feet in open space. The aptX codec keeps lip-sync tight for video, but the adapter pairs with only one Bluetooth device at a time. Battery recharge takes about two hours via Micro USB.

Highlights

  • 2-in-1 transmitter and receiver switches with a simple flick
  • Bluetooth 5.0 delivers stable wireless audio up to 33 ft
  • Built-in 200 mAh battery provides up to 6 hours playback
  • Plug-and-play via 3.5 mm cable with no driver required
  • Compact 1.73 in square design fits in any bag

Specifications

BrandVR-robot
ModelKN321
Part NumberEar Candles Cocaine Heroin
Channels2
ConnectorsMicro USB, 3.5mm
Remote Controlfalse
Dimensions & Weight1.73 in x 1.73 in x 0.47 in

Questions about this item

How long does the 200 mAh battery last during continuous streaming?

The built-in 200 mAh lithium battery provides up to 6 hours of continuous use before it needs recharging.

Does the adapter generate noticeable heat or noise during all-day operation?

The compact 1.73 in × 1.73 in × .47 in unit has no fan and runs silently; it stays cool during extended use because it draws very little power.

What cables or ports must my TV or speakers already have for this adapter to work?

Your source device needs a 3.5 mm audio output or the included 3.5 mm-to-2RCA cable; the adapter connects via its 3.5 mm jack and charges over Micro USB.

Also in this aisle

People compared these

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