Go down and check coupons out. Remember to check price history if it is available. What is best price?
wavelength 400-700nm, lifespan about 10, Lens Double coated tempered glass lens, Material Aluminum alloy, (body diameter) 27mm, Reflective system Acrylic lens, Switch Tail tactical switch, Runtime Hight Mode – 1h58min / Low Mode – 4h32min, 50, Battery Use one 21700 li-ion rechargeable battery, Distance Hight Mode – 2607m / Low Mode – 1553m, 000 press life, Light source Special LEP module, (length) 193mm, Size (±0.5mm) (head diameter) 60.5mm, Bezel Double coated tempered glass lens, black hard anodized surface, Intensity Hight Mode – 1782000cd / Low Mode – 603000cd, Weight 332.8±0.5g (without battery), Lumens Hight Mode – 560 / Low Mode – 187, 000 hours
Aliexpress
I could not find it on Aliexpress. 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. You can get coupon down below.
Link: Banggood product page
1. ($395.12): BGOutlight10
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGTORCH, bGhOnEy10, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGFLS15, 4BLF, BGAFF10OFF, BGCuponation10, BGHONEY2110, BG10OFFAFF, BGwhielabel, BGflashlight, BGdeals32, BGdeals54, BGdeals83, BG10OFFAFF1, BGdeals92, BANGGOODSD, BGTorch4, BGdeals247, BGdeals223, 00c906, BGtorch2, BGtorch3, BGAlerabat15, BGtorch7, BGLED07
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Weltool W4 Flashlight [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Weltool W4 Flashlight.
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)).