Motorola T100TP Talkabout Radio, 3 Pack Call Tones: A call tone is what people calling you can hear instead of the normal default ring. It grabs the attention of your family and friends before you start speaking. Flashing Low Battery Alert: Low battery alert reminds you when batteries are running low. Compatible with Any Radio: You can communicate with other FRS/GMRS radios regardless of brand by being on the same channel and privacy codes. Keypad Lock: Keypad lock prevents your personalized settings from being inadvertently changed. 22 Channels: With 22 channels, its easy to find an available channel.