Electronic Noise-proof Earmuffs With Bluetooth

technical data: material: abs foam pvc pomtype: em-9001bweight: 348 gbattery capacity: 750 mahfunctions: built-in microphones aux portadjustable: yeslow battery indicator: yesdata transfer standard: bluetoothnorm: en 352-1:2002 en 352-4:2001 + a1:2005 en 352-6:2002 en 352-8:2008protection category: iiisnr attenuation value: 29 dbbattery voltage: 3.7 v d.c.battery type: li-pooperating time: 30 hcharging time: 3.5 hcharger: usbautomatic shut-off: 2 hyt-74626 earmuffswith a wireless communication moduleusing bluetooth technology. They enable pairing with most smartphones tablets some laptops and other devices equipped with bluetooth technology. The four function buttons on the side of one of the cups allow among other thingsto adjust the volume answer and end calls or change to the next music track.the earmuffscan also be connected to some smartphonesusing the included jack cable. Thanks to the built-in aux port it is possible to listen to music in stereo as well as receive the sound of the interlocutor during a phone call (in this case the voice is transmitted through the phone's microphone).large and wide cushions distribute the pressure over a larger area of ​​the head and do not press on the auricles.a flat adjustable headband with a width of 35 mm with a flexible support distributes the pressure over a larger area of ​​the head making the headband almost imperceptible even after several hours of operation.additional informationaudible and light low battery alarmmicro usb charging port with red/green led indicatorusb charging cable approximately 50 cm long3.5 mm aux port3.5 mm jack cable 110 cm longthe knob is used to adjust the volume when connected via cable in the case of a wireless connection the volume we adjust the volume using the function buttons on one of the earmuff cups.how to select earmuffs for the workplace:protective anti-noise earmuffs protect the operator from harmful noise by reducing the volume level measured in decibels by the snr value. The upper limit for an 8-hour workday has been set at 85 db. If the average noise measurements in the workplace exceed this value then you should purchase earmuffs with an snr parameter that will reduce the noise level to 85 db or less. Assuming that we will work constantly with earmuffs with an snr 29 parameter in a work environment with a noise level of 113 db then we will reduce the noise to 84 db.if the operator wears the earmuffs for more than a dozen minutes it is worth paying more attention to design elements that improve their comfort. Sufficiently wide ear cushions made of skin-friendly materials should accommodate the user's entire earlobe. Soft headband padding will alleviate pressure on the top of the head. The force with which the earmuffs adhere to the head affects not only comfort but also attenuation effectiveness so for continuous use it's worth choosing earmuffs with a properly selected snr parameter not necessarily the highest available.**