Headset - Universal - Silent Control, 30 noise, headset.(Black) Highlights Universal Silent Control, 30 noise, headset.(Black) DIRECTORCONTROL 30 Noise Canceling Headphones Product is shipped based on the color or size of the main product page image. The SIMPERCONTROL 30 Bluetooth Wireless Noise Canceling Headphones have an isolating earphone design.These headphones are intended for use with Bluetooth enabled audio devices including cell phones and have a claimed wireless reception range 33 feet. They have a built-in microphone and built-in Bluetooth volume, music player function and call connect/disconnect controls. Additional features thus include adjustable ambient noise level monitor function and Bluetooth pairing NFC.The silenceControl 30 comes with three pairs of earpieces in different sizes, a USB charging cable and a carrying case, and is backed by a 12-month warranty.