Nia S4000 Bluetooth Headset Product Description Supports both wireless and wired connection modes Allows music playback through TF card and FM radio App control support for easy settings management Suitable for daily use travel and entertainment Specifications Audio interface 3.5mm Frequency response 20Hz to 20KHz Impedance 32 ohm Driver unit 40mm HD driver Battery capacity 250mAh Working time 6 to 8 hours Standby time up to 200 hours Charging time approximately 2 hours Wireless transmission distance up to 10 meters Package Includes One headphone One charging cable One user manual
