BlitzWolf BW-BR4 portable transceiver with bluetooth 5.0.

This module was primarily interested in the dual stream / multipoint function, which allows you to connect several signal sources or receivers and helps a lot after the appearance of a child in the house. If you want to watch TV, you just turn on your pair of headphones and don’t bother anyone else, if you wish, your wife turns on hers and joins in watching. As a bonus, we get a large coverage (at least 70 m²), a bunch of supported codecs (aptX ™ HD, aptX ™ low latency, aptX ™, AAC, SBC), many inputs / outputs and good autonomy.


Manufacturer: BlitzWolf®
Model: BW-BR4
Colour: Black
bluetooth: V5.0
Frequency: 2.402~2.480GHz
Interface: MicroUSB(5V charging), 3.5 mm AUX, SPDIF in/out, RCA
Chipset: CSR BC8675
Signal coverage: Class I, 30~50m
Profiles: A2DP, AVRCP
Destination: aptX™ HD, aptX™ low latency, aptX™, AAC, SBC
< b>As transmitter: aptX™ HD, aptX™ low latency, aptX™, SBC
Battery: 3.7V 600mAh
Charging time:< /b> 2.5 hours
Standby as a receiver: about 175 hours
Receiver: AUX/SPDIF about 15 hours
Transmitter: AUX about 15 hours, SPDIF about 17 hours
Operating temperature: -10-55℃
Weight: 111.2g
Dimensions: 85.2*80.8*23.1mm

Unpacking and appearance.

Delivery was carried out by MaxiPost in their branded black bag with white tape.

Traditionally, there are a couple of green inserts and the model name on the box

There are some characteristics on the back

The module itself is on the “pedestal”

Under it 60 cm AUX, 30 cm microUSB, 1 meter optical and 25 cm 3.5mm to RCA cable. Well, waste paper.

Instructions closer


And a little more

On the front end of the device there is an on / control button, an operation indicator , AUX and RCA connectors.
Depending on the selected mode, they work as inputs or outputs.

Rear mode switch, SPDIF input and output, microUSB for charging and antenna.

At the bottom there are some characteristics and two anti-slip strips.


First, let’s look at the receiver’s bluetooth mode, which I don’t use in practice.
Move the switch slider to the RX mode and hold down the power button for 2 seconds. The module automatically enters pairing mode, while the red and blue indicator flashes alternately

After connecting, if there is no transmission, the indicator glows blue, when the signal source is turned off, the indicator flashes blue twice per second. By also counting the number of flashes every 10 seconds during data transfer, you can understand which codec is used:

SBS – one
aptX – two
aptX low latency – three
aptX HD – four
AAC – six

My phone does not want to work with aptX, so I only tested it with SBS and AAC

The indication corresponds to the declared one and 6 flashes, respectively

Well, the mode that I use all the time is TX(transmitter).

The first time you turn it on, it enters pairing mode and the indicator light flashes blue quickly. If there are headphones nearby in pairing mode, they will be automatically connected. It can also hook on modern models that can work in multipoint mode. For a long time I could not understand what he was immediately connected to, it turned out to be computer headphones (model "with reduced social responsibility"). In the absence of a signal, the indicator lights up blue as in the receiver mode, if the headphones are turned off, the indicator flashes once a second.
Forced pairing mode can be entered by double-clicking the power button