Anker Soundbuds Sport (A3233) is a pair of wireless bluetooth earphones that I got many years ago to use while running. (Anker is now fully focused on battery and charging products, but a few years ago they were into audio too.)
Appearance: Each of the earbuds has a rubber earhook to secure it within the ear. The earphones came with 3 sizes of eartips and earhooks. The earbuds are connected by a cable that rests behind the neck. The cable has a fithook that can be used to secure the cable so it does not interfere during physical activities.
Features: IPX4 water resistance and supported Bluetooth 4.0.
Buttons:
Battery: The left earphone has a micro USB-C slot for charging. The earphones promise a 8-hour playtime on full charge.