Can't find much that is relevant about this gadget. This is what I have found so far:
https://www.amazon.co.uk/BWSS-Wireless-Learning-Transmitter-Receiver/dp/B07KWKN4RH
Brand Name: CENTURY AOKE
Item Type: Switches
Model Number: 3.5-12 2ch
Warranty: 1
Remote Distance: 10-100m
Features: mini receiver
Certification: CCC
Switch Type: Remote Control
Frequency: 315mhz only
Product Description:
Max Load: 2A . Each relay 1A (have better Load less than 700ma)
Quiescent Current: 7ma
Relay Working Current:1 Relay ON 50ma , 2 Relay on 100ma
Size: 0.87inch*0.81inch*0.44inch
Working Mode: Momentary, Toggle, Latched, Delay time, adjustable
Encoding Type: Learning Dot to add Transmitter
Input DC4V-DC24V Output 0V Switching Value
Working Way :
Momentary: press one button is working /ON. loosen your finger on the same button is stop/OFF
Toggle : press one button for one time is working/ON .press the same button again is stop/OFF .
Latched : press button A is working/ON ,press button B is stop/OFF
Delay time : Press remote control A button, the corresponding relay actuates and keeps working until the time out.(5S)
Learn method :
Input 12V for the Receiver , Connect the Learning Dot, The receiver Led indicator ON. Press remote button A 1 time, Led indicator flash for 1 times , Then Press remote button B 1 time , Led indicator flash for 1 times again , it mean learning successfully
Clearing method:
Connect the Learning Button . Until the receiver Led indicator flash for 5 times, it mean Clearing Code
How to change working way :
L: Connect the Learning Dot . Until the receiver Led indicator flash for 1 times, it mean Change L successfully.
M: Connect the Learning Dot . Until the receiver Led indicator flash for 2 times, it mean Change M successfully.
T: Connect the Learning Dot . Until the receiver Led indicator flash for 3 times, it mean Change T successfully.
M4 Signal temporary : Connect the Learning Dot . Until the receiver Led indicator flash for 4 times, it mean Change Delay time successfully.