Weight About 226g/500g, Switch Push Switch, LED NM1 LED, 4Modes High – medium – Low – Strobe（Double click）, Dimensions 152mm(length)x 64mm(head)x 30mm(Tail), Distance 500-1000M, Case material Aviation aluminum outer shell (hard oxidation), Model Name X40, Emitted Color White light, Battery For 1x 21700 battery, Brand Name AloneFire, Flashlight Color Black.
Just check coupons out (with price alert and history). 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 and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($59.00): FIN8217
2. ($73.35): 00c906
you should apply the coupon in your cart 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): BGflashlight, BG10OFFAFF1, BANGGOODSD, BGTorch4
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Alonefire X40 Flashlight with 21700 Battery. The lowest price was: $54.59.
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)).