Bluetooth Handsfree: Yes • Bluetooth Version: V4.0 • Operating Range: 10m • Total Power: 3W • Channels: 1.0 • Interface: 3.5mm /USB 2.0 • Microphone: Yes Design: Mini,Portable Compatible with: iPhone,iPod,Laptop,Mobile phone,MP3,MP4,MP5,PC,Tablet PC,TF/Micro SD Card Supports: Bluetooth,FM,Hands-free Calls,Microphone,NFC,TF Card Music Playing,Volume Control,Waterproof Functions: AUX Function Connection: Wireless Interface: 3.5mm Audio,Micro USB,TF Card Slot Audio Source: Bluetooth Enabled Devices,Electronic Products with 3.5mm Plug,TF/Micro SD Card Certificate: CE,FCC Material: Plastic Color: Army green Bluetooth version: V4.0 Audio File Format: APE,FLAC,MP3,WAV,WMA Transmission Distance: W/O obstacles 10m Speaker Impedance: 4 ohm Power Output: 3W S/N: More than 60dB FM Radio Frequency: 87.5-108MHz Support O.S: Linux,Mac OS,Windows 2000,Windows 7,Windows 98,Windows 98SE,Windows ME,Windows Vista,Windows XP Power Source: USB Charging time: 3-4 Hours Lasting Time: 6-8 Hours Battery Capacity: 1500mAh Brand W-KING SKU 100462012_NP-1020756026 Model s7