I trade stock index futures. I now have my charting software set up with an indicator which triggers perhaps twice a day. When it does so I enter my buy/sell orders. It also plays an audio file when the indicator triggers. Presently this is fed through an amplifier and speakers so that if I am in the room or the adjacent room I will hear it. I would like more freedom of mobility. I was thinking of using 2 digital phones on intercom; placing one by the speaker and carrying the other around with me. It occurs to me that there may be a better solution.