HMDX Jam Fusion Buds Wireless Bluetooth In-Ear Headphones / Headset with Microphone - Red BLUETOOTH - Connect wirelessly with any Bluetooth device in a 30-foot range. RECHARGEABLE - Charge for 4 hours to provide up to 10 hours of play time. SPEAKERPHONE - Answer calls directly from your Jam Fusion Buds. SAFE SURROUND - Mute the left earbud so you can hear your surroundings. EAR HOOKS AND FINS - Choose from multiple sizes for a custom, secure fit.