medium bright 3h, Input 5V 500mA Operating temperature -20-50℃ Storage temperature -10-35℃ Power interface Micro-USB Waterproof IP45 Angle adjustment Support three-angle adjustment Illumination brightness Low light 17h, highlight 1.3h Lumen 105LM Type of light source LED Color Red Size 48x 28x 32mm / 1.89x 1.10x 1.26inch Weight 27g.
You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
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 price update (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($27.93): 13f142
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/i1u
Old coupons (from the oldest to the newest): 2be6e9, 935bc1, plxmnl, 0e7f33, FBCOUPON1, BGAFF10OFF, BGCuponation10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi FH100 Headlamp. The lowest price was: $16.59.
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)).