Wireless Charging time: 2.5h, Frequency response range: 20HZ – 20KHZ ; Wireless Range: 10M, Driver sensitity: 104dB KHz, ANC ON: 4h(charging one time) / 20h (charging box), Driver: 6mm Balanced Membrane(MagnetoSatic) + 11mm Dynamic, Wired Charging time: 80min(earphone); 110min(charging case), Music play time(50%volume): , ANC OFF: 5.5h(charging one time) / 25h (charging box), Battery: 44mAh(headphones) / 535mAh (charging case) ;, Water resistance|(headphones): IP54, Name: OPPO ENCO X ANC Wireless Earphone (Active Noise Cancellation).
Price history, coupons and price alert are available on this page. 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 coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($177.68): BG651551
apply it in your cart 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): BGLOAC1, 13f142, BGOPPOX, BGf398d0, BGa0b145, BG0b9530, BGBuscape01
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for OPPO Enco X Bluetooth 5.2 Earphones. The lowest price was: $118.99.
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)).