diff --git a/monitor.py b/monitor.py
index 6692434..21f8879 100644
--- a/monitor.py
+++ b/monitor.py
@@ -752,7 +752,9 @@ def process_message(_bmessage):
                 log_message = '{} {} {}   SYS: {:8.8s} SRC_ID: {:9.9s} TS: {} TGID: {:7.7s} {:17.17s} SUB: {:9.9s}; {:18.18s} Time: {}s '.format(_now[10:19], p[0][6:], p[1], p[3], p[5], p[7],p[8],alias_tgid(int(p[8]),talkgroup_ids), p[6], alias_short(int(p[6]), subscriber_ids), int(float(p[9])))
                 # log only to file if system is NOT OpenBridge event (not logging open bridge system, name depends on your OB definitions) AND transmit time is LONGER as 2sec (make sense for very short transmits)
                 if LASTHEARD_INC:
-                   if int(float(p[9]))> 2: 
+                   # save QSOs to lastheared.log for which transmission duration is longer than 2 sec, 
+                   # use >= 0 instead of >2 if you want to record all activities
+                   if int(float(p[9])) > 2: 
                       log_lh_message = '{},{},{},{},{},{},{},TS{},TG{},{},{},{}'.format(_now, p[9], p[0], p[1], p[3], p[5], alias_call(int(p[5]), subscriber_ids), p[7], p[8],alias_tgid(int(p[8]),talkgroup_ids),p[6], alias_short(int(p[6]), subscriber_ids))
                       lh_logfile = open(LOG_PATH+"lastheard.log", "a")
                       lh_logfile.write(log_lh_message + '\n')
@@ -783,6 +785,7 @@ def process_message(_bmessage):
                                    my_list.append(row[10])
                                    n += 1
                                f.write(hline+"\n")
+                            # maximum number of lists in lastheard on the main page 
                             if n == 20:
                                break
                       f.write("</table></fieldset><br>")