$11.99 – LAOTIE LS80 Smart Brake Sensor Bike Taillight 500mAh Battery 6 Light Modes Type-C Rechargeable IPX5 Waterproof Wear-resistant Bicycle Rear Light for Night Cycling.
I have checked all old coupons and price is $11.99 for LAOTIE LS80 Smart Brake Sensor Taillight 500mAh (in Banggood). You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood ($11.99)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? Is it good price? Looks like a good price to me (average is $12.32).
Link: Banggood product page
Price: $11.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGTYLS80, BGTYLS80A, BGEULS80
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
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.
Price history and price alert
Check out price history chart (for all/most countries) for LAOTIE LS80 Smart Brake Sensor Taillight 500mAh. The lowest price was: $10.99.
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)).