Introducing the VX-NANO40 by Radians Inc. - our premium Vertex Nano in-ear hearing protection engineered with your comfort and safety in mind. Spend your day with ease knowing your hearing is safeguarded by these exceptional ear plugs.Our tailored micro-circuitry offers two distinctive modes; standard and amplified, both functioning with blazing fast reaction times of less than 0.02 seconds to react against potential damaging impulse noises.Each dedicated ear plug for right and left ears is independently powered by highly efficient 312 zinc air cells, delivering impressive battery life up to 120 hours. For your convenience, batteries are included with the device, along with an extra set to ensure uninterrupted hearing protection.