An electronic larynx (electrolarynx), is a battery operated machine that produces sound for you to create a voice. Since 1979, ROMET has been dedicated to providing quality products to thousands of Laryngectomees worldwide. We strive to continue to introduce innovative advancements in Electronic Larynx technology, individual tone and volume wheels on the outside of the unit for easy adjustment – no tools required; our newest model R310 which has a permanent hi-power Lithium Battery that never needs to be replaced, and can easily be recharged with the USB cable provided. Electronic Larynx the R310 unit is easy for the patient to change intonation simply by sliding their finger on the exterior side bar to customize their voice as they speak. Also change their volume by pushing the function button (FB) on the base of the unit as they slide their finger on the flat bar. Arguably the newest technology of any Electrolarynx unit sold in the world you deserve to test it for yourself by contacting your local distributor of Romet products.