Frequency rangeú¦400-420mhz/450-470mhz Computer software write the frequency Channel 16, 39 group ctcss analog audio dumb Reported in the english-frequency voice and the voice prompts, and other design features of human nature Super power-saving feature Aesthetic appearance, durable Simple operation 1200mah lithium batteries Resonant voice, the channel broadcast Low-voltage warning function Weight:about 200g(including battery pack) Volume:100íß50íß28¬l Theoretical distance calls: 5-6km