Walkie Talkie Australia - 2 Pack Channels: 22 channels (each channel has 99 mute tones (mute code), greatly enhancing the privacy of the call. Hands-free: Built-in voice control function VOX. You do not need to press the call button during the call, and directly voice control sends. Communication distance: the measured distance from the sea is 0.5KM, the outdoor open area is about 1-2 kilometers, and the outdoor actual use of buildings About 500 meters, indoor use penetrates about 3 to 5 floors. Ring tone selection: This machine has a variety of different calls to choose from, suitable for personalized for you. Channel scanning function: This opportunity automatically scans 22 channels in sequence, and can select a valid channel currently in use. Automatic scan channel Background light LCD display Switch for sending end-tone. Monitor function is controlled by software switch. Multiple channel selection and channel display. Battery power detection. 10 call tones for choosing Key tone switch function Lock key switch function CALL sending function Power: Transmit power: 0.5W Use with 4*AAA batteries (batteries not included) Colors: Yellow with blue, Pink with blue, Green with pink