Retevis RT87 is a professional IP67 water-proof radio. RT87 has an important function CTCSS/DCS scan.Take Retevis RT87 and Retevis HD1 as examples.
1. Retevis RT87 and Retevis HD1 set the same frequency in analog mode.
2. Press and hold the Retevis HD1 PTT button for a long time, and the Retevis RT87 D click the MENU button, select the QT-SCAN button, scan the sub-audio of the HD1.
3. Set sub-audio equal for Retevis RT87 and Retevis HD1.