Features: PORTABLE DESIGNThe electronic protection earmuff has a stylish,low-profile and lightweight design,which is easy to carry and use anytime,anywhere.NOISE REDUCTION DESIGNFeaturing a noise reduction rate (NRR) of 23dB,it lets you hear the noise you need and not the noise you dont.VOLUME CONTROLIt is designed with an audio insertion jack and an embedded volume control button,which can be inserted into the earphone cable for use,and it is convenient for volume control.HD SPEAKERThe electronic protection earmuff is equipped with a full dynamic range HD speaker for clear and balanced sound and an omnidirectional microphone.BATTERY POWEREDThe electronic protection earmuff is powered by 2 AAA batteries,which is easy to replace and can be used for a long time.Specifications: Material: plasticColor: blackPowered by: 2 x AAA batteries(not included)Package Included: 1 pc x electronic protection earmuff1 pc x headphone cable1 pc x user manualNote: 1. Due to the light and screen difference,the items color may be slightly different from the pictures.2. Please allow 0.5-2 cm differences due to manual measurement.