  | 
                                        Select F3021 for VHF, F4021 for UHF | 
                                      
                                      
                                          | 
                                        “T” versions have 10-key pad | 
                                      
                                      
                                          | 
                                        “S” versions have 4 buttons for simpler operation | 
                                      
                                      
                                          | 
                                        Wide frequency coverage | 
                                      
                                      
                                        
                                            - VHF:  136-174MHz
 
                                            -  UHF:  400-470MHz
 
                                            -  Wide and narrow channel spacing(25, 12.5 kHz) is programmable per channel
 
                                            | 
                                      
                                      
                                          | 
                                        Compact lightweight body  | 
                                      
                                      
                                          | 
                                        IP54 dust-protection and splash resistance  | 
                                      
                                      
                                          | 
                                        128 memory channels and button control memory channel | 
                                      
                                      
                                          | 
                                        Most popular signalings built-in | 
                                      
                                      
                                          | 
                                        Multiple 2-Tone, Multiple 5-Tone  | 
                                      
                                      
                                          | 
                                        Lithium-ion battery standard | 
                                      
                                      
                                          | 
                                        Alphanumeric display | 
                                      
                                      
                                          | 
                                        TOT function and lock out penalty timer  | 
                                      
                                      
                                          | 
                                        8 DTMF autodial memories  | 
                                      
                                      
                                          | 
                                        2-step power saver | 
                                      
                                      
                                          | 
                                        500mW loud and clear audio  | 
                                      
                                      
                                          | 
                                        Embedded ESN (Electronic serial number)  |