Bluetooth 4.0, Current: 50mA, Bluetooth Switch, Power: 1 * AA Battery(Not Included.), Forward Button, Right Button, Connection: Bluetooth 3.0, Acceleration: 10G, Resolution: 600-1000-1300-1600DPI, Button: Left Button, Tracking Method: Optical, Dimension: 103.91*65.43*37.29mm, DPI Switch, Tracking Rate: 30inch/s, Weight: 83.2g, Backward Button, Scroll Wheel, Voltage: 1.5V, 2.4GHz Wireless.
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 price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($16.99): BG569D
2. ($20.38): AFfbG10
just apply this code 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): 502C6B, e18b44, TTxBG10, BG3CSUM
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for Rapoo M300 Wireless Mouse. The lowest price was: $14.99.
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)).