The Cobra 25-Mile 2-Way Radios, 2 pk feature a compact design. With weather alerts, you'll be prepared for storms and emergencies with built-in NOAA radio receiver. Voice-activated (VOX) transmission frees hands for other tasks. Five selectable tones will distinguish between different parties for incoming calls. A total of 2,662 channel combinations are available when the 22 channels are combined with the 121 privacy codes (38 CTCSS/83 DCS). These combinations prevent interference from other radios.