Working Temperature -20℃~ 80℃, EDS +/-12 kV Air; +/-12 kV Touch, Resolution Ratio 508DPI, Battery 3.7V 310mA, Fingerprint Capacity 20 Sets, Color Black, Net Weight 100g, Standby Time Half a year, FAR < 0.002%, Charging Time 30 mins, Working Humidity 40%RH ~ 85%RH, Sensor Time 0.5s Fast Recognition, White, FRR < 1%, Material ABS + 304 Stainless Steel, Model T6 Smart Fingerprint Lock, Size 98x 26x 15.5mm / 3.86"x 1.02"x 0.61". Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
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. One coupon is available. Cool!
Link: Banggood product page
1. ($13.99): BGXV139
you should apply the coupon in your cart 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): BGXV144
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Xiaovv Smart Fingerprint Lock. The lowest price was: $13.99.
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)).