Basically copy coupon, view price history or create e-mail price alert. What is best price?
Battery specification 2*1 5V AAA, Storage humidity 20%~80%RH, Sound prompt Yes, Maximum battery life 8000 times, Laser type Class II 635nm / < 1mW, Data storage 99, Measuring distance 0.05m-60m/80m, Automatic shutdown 150sec, Automatic laser cut-off 20 seconds, Brand DUKA, Product Name LS3 laser distance meter, Product size 112* 50* 25mm, Measurement accuracy ±(1.5mm+d*5/10 /000th), Operating temperature 0°C~40°C, Storage temperature -20°C~60°C
Aliexpress
There’re some similar (or not) items on Aliexpress
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. There are no active coupons for this product, but the price is pretty low isn’t it?
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGABAL, BGCuponation10, 13f142, BGHONEY2110, BG10OFFAFF
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for ATuMan DUKA LS3 Digital Laser Rangefinder 60/80m.
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)).