CONTROL APP – The application ease of use is direct and to the point. You can pair the Walker’s BT 2/0 within the application, control the volume of each bud separately, program various sleep modes, battery charge indication and four sound quality modes. RECHARGEABLE BATTERY – The rechargeable lithium battery is offered to increase the run time length for the headset. The battery, when it does need to be recharged, can be charged by using the Micro USB charging cable that is included. OPERATIONS MODES – Walker’s Silencer 2.0 earbuds feature 4 program settings; Switch between Universal, High Frequency, Power Boost, and Clear Voice operation modes to be prepared for any situationion, variable gunshot suppression. COMFORTABLE FIT – The Silencer 2.0 is a non-intrusive design with a comfortable direct insertion into the ear with 3 sizes of Sure-Lock fins and foam tips; It boasts a sleek and modern design with ergonomic button placement and improved positioning for comfort and usability. WALKER’S – HEAR LIKE YOU’VE NEVER HEARD BEFORE. For over 25 years Walker’s has developed innovative solutions to provide ear protection for shooting, hunting, and commercial applications. Walker’s line of products is widely considered the industry standard for shooting ear protection and safety. With the introduction of advanced digital circuitry & nano tech water repellence, Walker’s continues to raise the bar and provide the best shooting hearing protection. Silencer 2.0 Now Even Better Than Before. Walker’s line of Silencer Hearing Protection just got even better with the new Silencer 2.0 Bluetooth Ear Buds! Now featuring improved battery life and a wider connection range over the original model, you can protect your hearing for longer periods of time with more freedom of movement. Also improved is a much more stable left/right ear bud connection. What hasn’t changed is Walker’s commitment to hearing protection. Designed in the USA. Walkers Made, Walkers Quality.