$16.99 – Transmission Rate: 50 (Mbps), Distance(L.O.S): 20m, bluetooth version: 5.2+EDR, Size: 49x49x14mm, Material: ABS, Model: TRX30, Effective Working Distance: 10 (m), Color: Black, Whether it is plug and play: Plug and Play.
When I was updating this page, then coupon price was $16.99 for TRX30 Bluetooth 5.2 Transceiver Audio Transmitter Receiver (in Banggood). Just check coupons out (with price alert and history). Do you want to know what the best price is?
Latest coupon code price check (UTC time):
Banggood ($16.99)
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood). Is it cheap? From what I can see this price is higher than average price ($10.32).
Link: Banggood product page
Price: $16.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG68b0f4, BG589b2e
(these coupons are old, so probably won’t work)
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for TRX30 Bluetooth 5.2 Transceiver Audio Transmitter Receiver is here. The lowest price was: $9.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).