Bluetooth Headset, ULDUM&reg; Bluetooth V4.1 Stereo Super Bass Built-in Microphone Over-ear Headphone for Cell Phones Smartphones Tablets MP3 and All Bluetooth Music Player Devices - Ivory Blustooth Stereo Headsets Were Authorized by CE,FCC,ROHS and UL. Bluetooth Super Bass Hi-Fidelity Stereo Headsets with Built-in Stereo Microphone, Noise Cancelling, Sweatproof,Folding for Easy Storage. Bluetooth V4.1 Connects up to 33 Feet(Range based on without any obstacle),Working Time: Over 8 hours,Support to connect two devices onec at same time,In-line Control Valume Function, Standby Time: 10 days USB Charging for 2 Hours. 8 Hours of Enjoying Music Time,Guarantee that Bluetooth Headset Are within Earshot during Camping,Hiking or Other Outdoor Activities Compatible with iPhone iPod iPad HTC XIAOMI SAMSUNG Android Smartphones MP3/MP4 Bluetooth Players Tablets and All Bluetooth Music Devices