The Primos Boost HD Series BTE is the smallest, lightest, most comfortable behind-the-ear device in the market today. With the Boost's 30dB of gain and 4 preset memory settings, your surroundings will come alive as soon as you put it on. Every Primos Boost Series comes with a left and right fitted thin tube and 4 patented dual-layer soft foam tips for optimum comfort. The Boost features Dynamic Contrast Detection and an advanced Static Feedback Manager to protect your hearing at all times. As with all of Primos' hearing enhancement products, the Boost BTE's have sound-activated compression built in to protect from the harmful effects of muzzle blast. Also includes an upgraded circuit to provide you with Advanced Noise Reduction for even greater sound clarity and protection. NRR 29 rated. Includes 2-year manufacturer's warranty. Requires 10A button cell battery (included). Flesh color.