With P7, we have created a headphone driver that works more like the drive unit in a hi-fi speaker, with a diaphragm focused purely on the job it's supposed to do: generate sound. Which means a drive unit with a more precise, controlled movement. Connectivity Technology: Wired P7's ear pads feature a dual cavity cushion design that helps the pads mold to the contours of the wearer's head. This design maintains a consistent volume of air between the drive unit and the surface of the ear at both sides of the head. Not only is stereo imaging enhanced, but the sound is optimized for every listener. Frequency range-10Hz to 20kHz

High-Quality Sound--Vegkey stereo bluetooth headphones adopt the latest version of A2DP and AVRCP stereo tech, and 95dB high Signal to Noise Ratio(SNR) to provide you a Hi-Fi CD quality stereo music, crystal clear sound. Comfortable Wearing Experience--With the soft memory foam, the ear pads touched like as comfortable as the human skin. This lightweight wireless headphone (only 7.05oz) also reduces pressure on your head and ears. Retractable headband can facilitate you to find the most comfortable wearing way. Built-in Mic and Hands-Free Call -- Easy to press the buttons on the heaphone to catch or hang up the calls. So you won't need to worry about missing call when you are away from phone.(Bluetooth connection distance is 33ft). BUT Please Note that the built-in microphone only works in the Bluetooth mode.