This is Creational technology,Bluetooth 4.1 Version. Not only a Wireless Bluetooth Headphone, But also can use as a Wireless Mini Speaker. Can work well with Iphone 6s/6/5s/5c/5/4s/4; ipad series/ ipod/ itouch/ Mac laptop; Samsung S6/S5/S4/S3/S2; Note 4; Note 3; Note 2 and Samsung Galaxy all Tablet; Nokia Toshiba Sony and HTC; ATT; BlackBerry Smart phone and devices. Product FeaturesBluetooth V4.1 Top advanced Version Built-in microphone Built in Noise cancellation technology, Allows clear communication; Enables use as a headset and speaker. Can listen Music and Talk with Phone. 3.5mm audio jack Provides a simple wired connection of a variety of devices. 40mm drivers Headphone and Speaker total have four diameter 40mm Speaker.Built-in rechargeable lithium-polymer battery Built in 1000mAh Li-battery Battery, up to 25 hours Headphone play time, up to 3 hours speaker play time. also can Talk with Phone. Carrying pouch Protects the headphones during transport and storage.20Hz - 20kHz frequency response 64 ohms impedance(Headphone); 8 ohms impedance(Speaker) Space-saving foldable headband Allows simple transport and storage in the included hard travel case. Included micro USB Charge cable Makes it easy to replenish the batterys power. Passive noise reduction Up to 15dB blocks background sounds for an immersive listening experience. Noise Blackout with dual microphone technology promotes optimal call quality. 115dB sensitivity (@ 1kHz) Delivers powerful sound. Frequency Response Frequency Response:20Hz-20KHz Rated Power output Bluetooth headphone Rated power is 100mW ; Bluetooth Speaker Rated Power is 3w.