An apparatus includes a processor, a transceiver connected to the processor, an integrated circuit connected to the processor, a first proximity sensor configured to provide a first sensor input to the integrated circuit, and a second proximity sensor configured to provide a second sensor input to the integrated circuit. When the integrated circuit determines that the first sensor input represents a first detection event, the processor sets a timer and when the timer expires before the integrated circuit determines that the second sensor input represents a second detection event, the processor sends a message through the transceiver.