Weight 800g, Model uLsp520, Heating temperature Low45±3℃, Massage cycle, Name Mini Knee Massager, Power supply mode Li battery, High55±3℃, Middle50±3℃, Size 189mmx168mmx144mm, Operating temperature 0℃-40℃ humidity≤80%, 15minutes, Color White.
Price history, coupons and price alert are available on this page. What is best price?
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. Only one coupon available!
Link: Banggood product page
1. ($169.28): BG10OFFAFF1
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): TTxBG10, BGOD1, AFfbG10, affbg10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGODFNJ1, BGODFNJ2, BgoFErTaSchInA10, BgcLuBofErtA10, BG19561, BGMASA01, BGCuponation10, 7bcdf9, BG10OFFAFF, BGwhielabel
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Knee Massager. The lowest price was: $96.99.
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)).