Bluetooth 5.0 Audio Transmitter Receiver 2 in 1 Digital Optical TOSLINK 3.5mm Wireless Audio for TV Stereo System aptX CRS

Product Model:LT-BYL-1820

This item is a stereo/fiber-optic bluetooth adapter that accepts/transmits two-in-one. 
It toggles the mode selection switch to switch whether it is in the receiving state (RX) or the transmitting state (TX).
It can also be switched through the interface. (AUX: audio interface; SPDIF: fiber interface) Select audio interface or fiber interface.
It supports one with two functions (two stereo Bluetooth speakers or stereo.
Bluetooth headphones can be connected at the same time in TX state, two speakers/earphones can simultaneously emit sound; in RX state, two mobile phones can be connected at the same time. Currently there can only be one The mobile phone sounds, which mobile phone first sounds which mobile phone sound is currently).
Using CSR 5.0 Bluetooth chip as core data processing, Bluetooth version is: V5.0.
Transmit power: Class II, use range within 10 meters (actual range depends on the equipment connected to it).
Description
Frequency range: Bluetooth standard, 2.402 ~ 2.480GHz.
Supported Bluetooth speaker or headset pairing security keys are: 0000, 1111, 1234, 8888.
Charging time is about 2 hours, charging input requirement: 5V DC ≥300MA.
350mAh lithium ion polymer rechargeable battery.
Working temperature: -10-55 °C.
Size: 60*60*18.4mm.
Color: Black.
Interface 3.5mm.
Transmission rate: 2000 (Mbps).
Effective working radius: 10 (m).
Bluetooth standard: 5.0.
Operating frequency: 2.4 (MHz).
Notes: 
Due to the light and resolutions setting difference, the item's color may be slightly different from the pictures.
Please allow slight dimension difference due to different manual measurement.