AmpliVox SW6220 0.5 Mile Hailer Wireless Kit: * Easy to use in emergency situations * Use with 2-way radios or AmpliVox 2W MURS frequency transceivers (does not require FCC licensing) * Emergency Siren Button: Loud 120 dB siren * Battery operation, 10 D cells or optional rechargeable Nicad battery pack (requires S1460) * Tripod mountable * Includes amplifier (SW805A), horn speaker, wireless transmitter with lapel and headset microphones and shoulder strap * Includes 2 MURS radios, extra speaker, tripod and carrying case