This highly useful wireless earbud is a proud possession - made from RCS certified recycled ABS plastic so that you use it guilt-free. All RCS certifications are by Intertek. RCS (Recycled Claim Standard) is a standard used to verify the recycled content of a product throughout the whole supply chain. The earbuds have a 40mAh built-in battery to provide 3 hours continuous playtime + 300mAh backup power in the TWS case. Uses latest Bluetooth 5.0 for an effective operating range of 10 meters. Also has fast charging of 1 hour.