This is a pair of comfort plus black edition in-ear Bluetooth headphones from Silicon Devices.
They are black in color and feature Bluetooth 4.0, a built-in microphone, interchangeable ear tips, a headphone clip, rechargeable battery, and an earpiece to hook the earbud into your ear.
These headphones come in a black case that measures 5" X 3" X 2". The headphones measure 24" long and the charging cable measures 8.5" long.
They were made in China and the product number is X000S4MZ07.
This item comes very good pre-owned condition with the original box and charger. They have not been fully tested but they connected via Bluetooth as well as played audio on both sides. They are being sold as-is.