Driver Unit : 30 mm Closed/Dynamic. Frequency Response : Effective range via Bluetooth/NFC mode: 20 - 20,000 Hz. Audio Format(s) Supported : SBC, AAC codec support. Noise Reduction : Total noise suppression - Approx: 10 dB (when power is on).Type of Use : Noise canceling/Bluetooth. Noise Level : ON/OFF switch on ear-cup. Design : Over-the-head, NFC / Bluetooth, Noise Canceling. Power Source : 3.7 V Built-in Lithium-ion rechargeable battery. Microphone : Omni directional, electret condenser Effective frequency range: 100 Hz - 4,000 Hz. Battery Type : Built-in Lithium-ion rechargeable battery. Power Source : DC 3.7 V: Built-in lithium ion rechargeable battery DC 5 V: When charging via USB. Battery Life (Approx) : Continuous music playback (BT/NC on): up to 25 hours, 29 hours NC off; Continuous communications (BT/NC on): up to 23 hours, 29 hours NC off; Standby time (BT on/NC on): 75 hours, 150 hours NC off. Power Consumption (in Operation) : 1.0 W. 4.5 hours, 17 hours (NC on) or about 21 hours (NC off) Continuous communication possible after 2 hours charge. : Micro USB cable: 19-3/4 inches (50 cm). (167 g) - including battery, without cable. Bluetooth® Technology : Bluetooth specification Version 3.0. 2.4 GHz band 2.4000 GHz-2.4835 GHz FHSS. Network Transport Protocol : A2DP (Sampling frequency 44.1 kHz) Transmission Range: 20-20,000 Hz Line of sight approx. NFC : One-touch Listening with NFC (Near Field Communications). The item "Sony MDRZX550BN/L BRAND Bluetooth and Noise Cancelling Headset (Blue) Headphone" is in sale since Wednesday, January 20, 2016. This item is in the category "Consumer Electronics\Portable Audio & Headphones\Headphones". The seller is "greatsaveforyou" and is located in NEW YORK. This item can be shipped worldwide.