New Foldable Wireless Bluetooth Stereo Headset Headphones with Microphone Features Support multi-point connection, connect with two different devices at the same time. Can call or answer the phone. Support voice report number automatically. Support voice reminding function. With power consumption display function for iPhone. With voice controlling function. Support song switching. CVC 6.0 smart noise reduction. Profile support: HSP / HFP / A2DP / AVRCP Function: Bluetooth, Voice control, Answering phone, Song switching, Multi connection function Connectivity: Wirele Driver unit: 11.5mm Sound Channel: Two-channel (stereo) Frequency response: 20-20000Hz Impedance: 16ohms±15 percent Sensitivity: 110±3dB Talk time: 6h Music time: 4h Standby time: 200h Bluetooth: Yes Bluetooth version: V4.1 Bluetooth distance: W/O obstacles 10m Sound quality is awesome Plug is 3.5 mm, can be used on PCs, laptops, phones, MP3 players and other players Headphones can be folded for easy transport