A lockable electrical receptacle for connection to the front end of a three wire electrical cord or extension cord. In particular, compositions are methods are provided for inhibition of interaction between a virus, especially HIV, and a receptor. Data can be efficiently transmitted by using an uplink indicator which indicates a specific location of a subframe. The invention further includes determining the precise start and end times of injection using cavitation created by the injection event by determining the intensity of light within a spray chamber. Thus, the device and methods allow for increased sample throughput and are simple and inexpensive to carry out compared to related devices and methods.