Lens Highly transparent white tempered glass, Emitter type SST20 LED, 6500k), Material, Battery 21700 lithium-ion battery (not included), Lumens 1000 lumens, Weight 92g, underwater 2 m, Reflector Reflectier-Smooth / bright vacuum plated aluminum alloy, Reverse rear switch, Range 343m (max), Waterproof IPX-8 waterproof, Switch, T6 aluminum alloy, Color Black, Light color Cold white and natural white available (5000k, Impact resistant 1m, Size 121mmx 31mmx 25.4mm.
Basically copy coupon, view price history or create e-mail price alert. 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.
Link: Banggood product page
1. ($13.14): BGSM30%
2. ($13.14): cbrIDgTec
3. ($13.46): fInbG2020
4. ($13.96): BGff2020
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGYSD2, BGTORCH, BGASD2, BGF1111, BGMH20N
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Check out price history chart (for all/most countries) for Amutorch Yootoo SD2 SST20 Flashlight. 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)).