TKO Menu Button Pushes... OEM Test/Reset: 1. HOLD DOWN F1 button through 2 dingdongs, then release. 2. It will tell you what it is doing until Instructions before Firmware v5.2 ES Change Communication: 1. Push F2 two times quickly without holding down. 2. It will tell you what communication is currently selected. 3. Push F2 until it gets to the desired method of communication. 4. Push the POWER button once to store communication method. 5. It will repeat to confirm. Change UHF Channel: 1. HOLD DOWN F2 button through 1 dingdong, then release. 2. It will tell you what channel is currently selected. 3. Push F2 to change it to the next channel, again to the next, until on desired channel. Push F1 to go downwards if necessary channel is lower 4. Push POWER button once to store channel selection. 5. It will repeat to confirm. Check Radio Module: 1. HOLD DOWN F2 button through 2 dingdongs, then release. 2. It will then test the radio module, and tell you if it is OK or if there is an ERROR. Instructions for Firmware = > v5.2 ES Change Radio Communication: 1. Push F1 two times quickly without holding down. 2. It will tell you what communication is currently selected. 3. Push F1 until it gets to the desired method of communication: Base, Rover, Static 4. Push the POWER button once to store communication method. 5. It will repeat to confirm. Change Communication: GSM, Internal, 3G, UHF 1. Push F2 two times quickly without holding down. 2. It will tell you what communication is currently selected. 3. Push F2 until it gets to the desired method of communication. 4. Push the POWER button once to store communication method. 5. It will repeat to confirm. Check Radio Module: 1. HOLD DOWN F2 button through 2 dingdongs, then release. 2. It will then test the radio module, and tell you if it is OK or if there is an ERROR.