Ryobi ES8000 Phone Works Jobsite Noise Suppressing Earphones with Voice Amplifying Microphone MEETS OSHA SAFETY STANDARDS 1926.52 and 1910.95 for exposure to sound levels at the construction workplace REDUCE UP TO 30 DECIBELS of noise at the jobsite with proper use OPTIMAL COMFORT with special foam that will conform to your ears upon insertion, allowing you to protect your ears without irritation CONNECT TO RYOBI PHONE WORKS smartphone application that allows you to record conversations and change sound settings BE HEARD ON THE JOB: The phone application, working in tandem with a microphone attached to the buds, can sense voices that appear below a certain decibel range on the jobsite. It then amplifies those sound waves so that others using the Ryobi Phone Works application can hear you more clearly