OPPO has manufactured headphones for quite a while but to be honest their TWS offerings in the past have been average at best. This year they are
OPPO Enco Free2
OPPO Enco series earphones – Buds, Air, Free2, and X – too good to ignore (sound review) - Cybershack
Affordable oppo enco x 2 For Sale, Earphones
Oppo Enco X2 review - news
OPPO Enco Free2
OPPO Enco Free3: New TWS earbuds with Bamboo Fiber Diaphragm-enhanced sound hyped ahead of launch - News
OPPO Enco X OPPO Global
OPPO Enco headphones -- three new sets with something for everyone, the Air, Free2 and Enco X
Oppo Enco Free True Wireless Bluetooth Headset Binaural In-ear Official Genuine Genuine Noise Reduction Headset - Earphones & Headphones - AliExpress
OPPO Enco Free2