Timer: 1H/3H/6H/ON, Atomization amount: 30ml/h, Humidification Method: Mist Discharge, Ultrasonic frequency: 2.4MHZ, Operation Method: Remote Control, Material: ABS + PP, Water-shortage Power off Protection: Yes, LED lights: 7 Colors, Noise: <35dB(A), 1inch=2.54 cm], Size: 16cm/6.30"x16/6.30"x10cm/3.94", [Conversion: 1cm=0.3937 inch, Voltage: 110-240V, Range of aroma: 21 - 30m², Humidity Control: Remote Control, Capacity: 550ml, Power: 15W, Installation: Tabletop / Portable. Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
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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. There are no active coupons for this product, but the price is pretty low isn’t it?
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BG5258, BG2020NS, BG3374, BG4860, BG4374, BG7960
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for 550mL LED Oil Ultrasonic Aroma Diffuser. The lowest price was: $16.99.
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)).