Backlight: 7 Colors, Buttons: 7 buttons, Dimension(LWH): 12.77×3.5×4.1cm, 3 Modes, Color: Sliver, Battery capacity: 1000mAh;, Sensor: PMW3212, Weight: 120g, Tracking Method: Optical, Model: M7, Connection: USB Wired + 2.4G wireless, Material: plastic, Resolution: 5 Grade DPI up to 2400DPI, Supported Systems: Windows XP /Vista/win9/8/2000, Charge Cable: 0.5M(charge only).
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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 and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($27.71): BGHONEY2110
2. ($29.79): 13f142
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGmouse002, 0e7f33, BGAFF10OFF, bGhOnEy10, BGdragonBoat, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for MACHENIKE M7 Mouse? There we go. The lowest price was: $19.69.
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)).