Brand: AIRAUX, Supporting protocols: HD / LL / apt / SBC / A2DP / AVRCP / AFH / HFP / HSP, Input interface: TYPE-C/USB A(adapter), Operating frequency range: 2.402GHZ-2.480GHZ, Model: AA-BT2, , Device name: wireless audio transmitter, Power supply mode: Powered by console TYPE-C interface, Connection distance: ＞8M(no occlusion).
Basically copy coupon, view price history or create e-mail price alert. What is best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGAABT2, 13f142, BGCuponation10, BGBuscape01, BGBRPL2, BGHOTSHOP15, BG53e9c8, BG144330, Terence, BG293b65, BG9cc780, BGbb3f88, BGb7aea0, BG4ce9c6, BGd173b4, BG8ReviTrage, Cuponation9, BG91eb0d, BG841a1d, BG75f9ab, BGd41726, BG6847ce, BGae434a, BGd2ab7c, BG4f8c58, BG17810d, BG1d80cd, BGaae264, BGAUDIO, BG6a0699, BG536e32, BG3931da, BG93337a, BGcf7e46, BGecc825, BG05284c, BG20542d
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for BlitzWolf AirAux AA-BT2 Bluetooth 5.0 Transmitter. The lowest price was: $7.49.
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)).