The STIHL DYNAMIC Soand ear protectors reduce high noise emissions to safeguard your hearing as you work. In-built Bluetooth® means these ear protectors enable you to use smartphone functions while you work. For example, with an established Bluetooth® connection to the STIHL DYNAMIC Soand ear protection bracket, you don’t need to take your mobile device out of your pocket to make calls or listen to music. The battery life of STIHL ear protection is up to 38 hours. STIHL DYNAMIC Soand ear protectors have a separate AUX input for connecting to non-Bluetooth®-capable devices.