22 preset channels with privacy codes for minimizing unwanted signals from others; Waterproof and dustproof (IP67) ; VOX allows for hands-free usage, automatically transmitting when user speaks ; Shock-resistant–can withstand 6.5 ft. drop; Bundle includes 8 radios, 8 headsets, 8 Li-Poly rechargeable batteries, 8 holsters, 4 dual charging bases, 4 micro USB cables, and 4 wall adapters;