Bluetooth Headset,ULDUM&reg; Bluetooth V4.1 Stereo Super Bass Hi-Fidelity Built-in Microphone Over-ear Headphone with for Cell Phones Smartphones Tablets MP3 and All Bluetooth Music Player Devices - Blue 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 Connect 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 daysUSB Charging for 2 Hours. 8 Hours of Enjoying Music Time,Guarantee that Bluetooth Headset Are within Earshot during Camping,Hiking or Other Outdoor Activitiesand never weigh you down. Compatible with iPhone iPod iPad HTC XIAOMI SAMSUNG Android Smartphones MP3/MP4 Bluetooth Players Tablets and All Bluetooth Music Devices