Features:

Transmitter and receiver 2 in 1
Transmitter mode: Turn your TV/Computer/Laptop into a bluetooth-enabled device. You can listen to the audio from your bluetooth headset and watch a movie or play a game without interfering with anyone.
Receiver mode: Connect the BR4 to your home speaker system/car stereo/headphones and turn it into a bluetooth audio device. You can then connect your smartphone or other bluetooth device and play music wirelessly.
BC8675 bluetooth Chip
The BC8675 chip gives you bluetooth V5.0 and optical audio output for a truly universal wireless solution.
164ft Wireless Connection Range
Built-in antenna, up to 50 meters (164ft) long range and stable transmission to share your audio from indoors to outdoors.
Optical Fiber Transmit
Gives you the option of digital connection to your playback device for maximum audio quality.
Long Standby Time
With a built-in 600mAh battery, you get up to 17 hours working time and 175 hours standby time. 

Specification: 

Brand	BlitzWolf®
Model	BW-BR4
Color	Black
bluetooth Version	V5.0
Frequency	2.402~2.480GHz
Interface	Micro USB(5V Charging), 3.5mm AUX, SPDIF Input/Output, RCA
Chipset Solution	BC8675
Operation Range	Class I,  30~50m/98~164ft meters
bluetooth Profile	A2DP, AVRCP
Battery Capacity	3.7V 600mAh
Charging Time	About 2.5 hours
Standby Time	RX mode: About 175 hours
Working Time	TO THE	RX	About 15 hours
		TX	About 15 hours
	SPDIF	RX	About 17 hours
		TX	About 17 hours
Operating Temperature	-10---55℃
Net Weight	111.2g
Size	85.2*80.8*23.1mm

 
Package Contents:
1* BR4 bluetooth Transmitter & Receiver
1* 3.5mm Audio Cable(60cm)
1* Micro USB Charging Cable(85cm)
1* Fiber Optic Cable(100cm)
1* 3.5mm to RCA Cable(26cm)
1* User Manual
1* Warranty Card