The C40i, an open-ear type, supports Bluetooth 5.4 and offers up to 24 hours of playback. - Model Name: C40i - Brand: soundcore - Bluetooth Version: Bluetooth 5.4 - Codec: AAC/SBC - Features: Open-ear type - AI Noise Cancelling: Yes - Maximum Playtime: Up to 24 hours - Accessories: Charging case This item is part of a lucky bag, so please refrain from purchasing if you are sensitive to imperfections or seek a perfect product. Thank you for viewing.