Hi I am changing broken Motorola BPR2000 bleepers to bleep on command. The micro and receiver pars gets ripped out, only the voltage doubler (1.5 to 3V) and the 13 digit LCD stays. The unit switches on without the normal beeps and by pressing the 'display number' button you increment the time to beep with 5 minutes. It then resumes the '--' display and starts countdown. The beep simulates the original and display the tell number of your choice. Good for: 1 getting out of meetings and tough spots. 2 reminder to turn off the garden sprayer. 3 getting in for a docter's appoinment. Keep bugging them to use their phone to 'answer beeper' 4 parking meter reminder. 5 Sunday (lunch) snooze controller. BTW. the C84 hangs by its legs. (like the Playstation chip -who is going to offer the playstation chip as a Weird, Wac..... application??) Regards Cassie