Radians Vertex Nano Wireless Electronic Earbuds 25 DB In The Ear Tan. The custom micro-circuitry has 2 mode levels for standard and enhanced amplification with a less than 0.02 second reaction time to protect against dangerous impulse noises. Dedicated right and left plugs are each powered by ultra-efficient 312 zinc air cell for up to 120 hours battery life. Batteries included plus extra bonus set of batteries. Specifications for Radians VX-NANO40 Vertex Nano Wireless Electronic Earbuds 25 DB In The Ear Tan: Manufacturer: Radians NRR: 25 dB Color: Tan Condition: New Package Contents: Radians VX-NANO40 Vertex Nano Wireless Electronic Earbuds 25 DB In The Ear Tan Radians VX-NANO40 Vertex Nano Wireless Electronic Earbuds 25 DB In The Ear Tan