The TP-2000BT TimePrompt with Bluetooth Technology from DSAN is a battery-powered timer with colored light to indicate the timer sessions, ideal for use in a conference room setting or for practicing the length of a presentation. The TimePrompt triggers the green, yellow and red lights in pre-programmed sequences from 15 seconds to 90 minutes. These light sequences can be re-programmed through a a PC application that connects to the timer with a USB. The timer can count up or count down, and beeps manually or automatically when the lights change. The TimePrompt can be controlled through Bluetooth technology by a second TimePrompt device at a 200' maximum distance.