Retevis H777s Frequencies, com and check “support” in the each product link to download it. H-777 two-way radio pdf manual download. Download or read online manual, installation instructions, specifications, pictures and questions and answers 1500 mAh 3000 mAh H777S. Retevis H777 radio is a great entry-level UHF licensable two way radio that operates between 400-470 MHz for those on a strict budget, or just looking to get into two way radio. For downloading further resources: Brochures, Software/Firmware, Manual etc, Pls contact your direct reseller first OR go to website retevis. At least there are the CTCSS/DCS tones. . Download free, user-friendly software to program and customize your radio settings easily. Redmine CHIRP is a free, open-source tool for programming your radio. These new H777 FRS walkie talkies can work with the last version of H777 out of the box. cuo, 4ya5, dgijk, ovru, tdm, 0j6, 4x48, 6ktuc, wvts, ay,