1 / 7Isobel ISDE-03 Bluetooth 5.0 Audio Transmitter
The Isobel ISDE-03 Bluetooth audio transmitter sends sound from USB or optical audio sources to Bluetooth headphones or speakers. Its claimed dual-link connection may suit shared listening, while Xbox use requires the optical cable and USB power.
At a glance
- USB audio transmission is described for computers, while optical TOSLINK is listed for TVs, TV boxes and game consoles.
- The listing claims two Bluetooth headphones or speakers can connect simultaneously.
- USB power is required during use. Computer audio and power are both described as travelling through USB.
- The manufacturer claims a connection range of up to 10 m, with range affected by surrounding conditions.
Reference price: $39.99
Price checked: 14 Nov 2026
View offerAhead of Black FridayExplore the selectionPros and cons
Pros
- USB and optical input options cover computer audio and compatible TV or console outputs.
- Dual-link streaming is claimed for listening through two Bluetooth headphones or speakers at once.
- The listed compact dimensions are 7.9L x 2.5W x 1.7H centimetres.
Cons
- Phone calls are not supported, according to the product description.
- The adapter needs USB power while operating, so it is not a battery-powered portable transmitter.
Technical specifications
17 specifications| Brand | Isobel |
|---|---|
| Model | ISDE-03 |
| Wireless connection listed | Bluetooth |
|---|---|
| Bluetooth standard | Bluetooth 5.0 |
| Audio input | Optical TOSLINK |
| Output mode | Stereo |
| Number of channels | 2 |
| USB connector listed | USB Type C |
| Control methods listed | Touch |
| Screen technology listed | LCD |
|---|
| Power configuration | Corded Electric |
|---|---|
| Voltage | 5 Volts (DC) |
| Rechargeable battery included | No |
| Material listed | Polycarbonate (PC) |
|---|---|
| Colour | black |
| Installation type | wired |
| Dimensions | 7.9L x 2.5W x 1.7H centimetres |
What to know before buying
Listing details to confirm
Listing details are inconsistent or unconfirmed: it calls this a USB and optical transmitter and separately lists USB Type C, yet specifies optical TOSLINK as the audio input. It also lists an LCD display and Touch controls without explaining their function, and includes contradictory battery-related fields despite describing USB power. Confirm the required connections and controls for your setup. Xbox use specifically requires the optical cable, and the Xbox Series USB port is described as power-only.
Who is it for?
A good fit for
- TV viewers who want to send optical audio to Bluetooth headphones.
- People wanting to share audio with two Bluetooth headphones or speakers, subject to the dual-link claim.
- Computer users seeking USB-connected audio transmission to Bluetooth headphones or speakers.
Less suited to
- People who need Bluetooth phone-call support.
- Setups without an available USB power source during use.
- Xbox Series setups without optical audio output or a way to connect the optical cable.
Customer reviews on Amazon
- 5 stars
59% 59% - 4 stars
12% 12% - 3 stars
7% 7% - 2 stars
6% 6% - 1 star
16% 16%
Customer feedback reports mixed experiences with compatibility and effectiveness. Some customers say the adapter works well, while others report that it does not work for them. This variability matters when matching the optical or USB connection to a particular TV, computer or console. The overall rating distribution is mixed rather than uniformly positive, so the listing's compatibility claims are not a guarantee for every setup.
Mixed feedback
- Customer feedback describes mixed compatibility and effectiveness, including reports of successful operation and reports that the adapter did not work.
Frequently asked questions
Can it connect to two Bluetooth headphones at once?
The listing claims simultaneous connection to two Bluetooth headsets or speakers. It does not provide further detail about how audio behaves across both connections.
How does it connect to a TV?
The listing describes using an optical TOSLINK cable to send audio from a non-Bluetooth TV to Bluetooth headphones or speakers. Check that the TV has a compatible optical audio output.
Does it work with Xbox Series consoles over USB alone?
No. The listing says the Xbox Series USB port is for power only and requires the optical cable for audio.
Can I use it for phone calls?
No. The product description says phone calls are not supported.
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