Power on:Press the on/off key for 5 seconds till the red indicator light on. GSM pen to listen Into live conversations by ringing it from any location. No one will suspect anything.
Power off:Press the on/off key for 5 seconds till the red indicator light on. About the GSM pen (usage scenario). The GSM pen could be used as a pen in the meeting. This item only GSM Pen transmitter.One GSM Pen transmitter supports multiple earpieces. You may using two earpieces with one pen to get better listening effects.