1、BLUETOOTH CONNECTIVITY: Implementing Bluetooth 5.3, the hearing protector headphone ensure stable and long distance connections. It pair quickly with any Bluetooth device within five seconds, ensuring an unshakeable sound stability. 2、NOISE CANCELLATION: SNR of 30dB provides effective noise reduction in various environments such as grass cutting, sawing, gardening, snow blowing, and construction sites. 3、SOUND INPUT JACK: The headphone's sound input jack enables you to listen to your MP3 player or smartphone. With a built in volume control knob, you have easy access to adjust your sound to suit your preference. 4、SOUND ASSIST FUNCTION: Equipped with sound assist technology that allows you to program multiple AM FM radio stations. Also, you will receive a notification when your battery is running low. 5、COMFORTABLE DESIGN: The ear muff is designed with a comfortable headband, striking a perfect balance between function and comfort. It's a must have for anyone working in loud environments. Item Type: Hearing Protector Headphone Material: TPU+ ABS+ 304 stainless steel Noise Reduction Rating (NRR): 30 dB Power Source: 3xAAA Alkaline Batteries (Batteries Not Included) 1 x Ear Muff 1 x 3.5mm Sound Cable 1 x User Manual