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Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi MHO-C201 Temperature Humidity Sensor [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (17.93 USD): 2022ACTIESNL
Coupon (18.12 USD): BG00c906
(CouponsFromChina.com tip: apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): d5ac53, vipupgrade8, f0d1e2, 502C6B, HHHHHOT, healthylifestyle, f19575, mihome, 99efdd, MIHOME, MISENSOR, MISENSE, MILIFE, ML15%Pro, BGTHHY0, BGHC715, BGBINKUPON768, BGSPV5, BGBFHC18, BGbeauty001, BGHMB7, BGEES11, bGhOnEy10, BgcLuBofErtA10, BGeLt15, BGAFF10OFF, BG871768, BGCuponation10, BGES1768, 13f142, BGHONEY2110, BGjune106, BGa291d1, BANGGOODSD, BG823d4f, BG9d5b8c, 00c906, BG090782, ADMITAD2212
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Xiaomi MHO-C201 Temperature Humidity Sensor [EU] (-3 USD)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi MHO-C201 Temperature Humidity Sensor.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).