Just check coupons out (with price alert and history). You probably want to know what is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
High precision adjustable 800 / 1200 / 1600dpi optical engine, Resolution: 1200DPI, 1600DPI, 800DPI, Transmit Range: 10m, Power Supply: 2x AAA Battery
Price history and price alert
We don’t have enough records in database to show price history for this item. BTW: We have only recorded this price: $2.99.
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)).