Bluetooth Stereo Beats HeadphoneModel:STN-450PRODUCT DEscriptION:4 in 1 Multifunctional stereo Bluetooth Headphone: Wireless Stereo Bluetooth + Card MP3 player + FM Radio + 3.5mm audio Wired Headset function. Noise Suppression Technology,Website:http://www.smartcoolproduct.com, bringing you clear sound effect. Be designed with two High-grade speaker and built-in Microphone, Powerful Bass system, bring you superior sound effect. Best choice for listening to music / FM Radio, watching movie, chatting online, etc. Easy to pair with almost any Bluetooth-enabled audio / music players devices, such as, Smart Phones, Tablet PC, Laptop, Notebook, etc. Supports hands-free function, conveniently answer the incoming call during travel. Low power consumption, bring you 8 hours of talking time, 10 hours of music playing time and 120 hours of standby time. High-quality, folding design and adjustable headband length, comfortable to wear and easy to carry.Model Number: STN-450Type: Stereo Bluetooth Headphone with Microphone.Bluetooth Version: 3.0 + EDR JianrongSupport Profiles: HSP, HFP, AVRCP,A2DP (Advanced Audio Distribution Profile)Operation Distance: 10m; Class 2Frequency Range: 2.4 GHz ~2.4835GHz ISM band. Sensitivity: - 85dBMusic Formats: MP3 / WMA. Supports TF / Micro SD Card (128M ~ 32G)FM Frequency: 87.5 ~ 108.0 MHzSpeaker Diameter: 40mm.Sensitivity: 115dB S.P.L at 1KhzResistance: 32ohmFrequency Response: 20Hz ~ 20KHzRated Power: 40WMicrophone Unit: 4mm * 1.5m -42dBPlug Type: 3.5mm Stereo Audio PlugRechargeable Lithium Battery: 250mAhTalking Time: 8 hoursMusic Playing Time: 10 hoursStandby Time: 120 hours Charge Time: 2-3 hoursCharge Poet: Mini USB 2.0Audio cable length: 112cmColor: White, Blue, Black, Red, Pink (Optional)Main item size (Folding): 18.5 * 11.5 * 8.0cm / 7.28 * 4.52 * 3.14inItem weight: 202g / 7.15ozPackage size: 21.0 * 17.0 * 9.0 cm / 8.26 * 6.69 * 3.54inPackage weight: 417g / 14.5ozFunction characteristics:Certificates: CE,ROHS,FCTransmission distance: 10mFrequency Response: 2.4 GHz ~2.4835GHz ISM band.Charging Interface: Micro USBIP Grade: IP67