iASUS 500K Headset with PTT Button - Clear Coil (for iPhone, Blackberry, Samsung, HTC, LG, ASUS and other smartphones) Compatible with all devices that support standard 3.5mm headset plug. Extremely durable polycarbonate PTT unit with volume control. Includes different ear pieces for different applications. Noise Isolation or Situational Awareness Includes the acoustic coil connector to customize the length of the coil for maximum comfort an convenience. 2 year warranty from manufacturer's defects.