In the "Write additional information" box (the description box shown in the picture), you can copy and paste the following text directly:
Truefree wireless earbuds in white, in excellent and clean condition, working with high efficiency, with their charging case. They feature pure sound, fast and stable Bluetooth connection, and a good battery. Suitable for daily use and calls. Serious buyers only.
You can copy and paste it there directly to post your ad with ease!