Keen can only be used on the hand it was trained for and cannot sense the other hand at the same time.  If your unwanted gestures involve both hands, and you order two Keens, we recommend starting with just one hand/Keen to get used to it before wearing your second.  During this time, some people who buy two Keens find by wearing one, the other hand naturally learns to reduce its behavior.  Other people who think they need just one Keen find that their other hand starts to take over, and so they need two.  Each person has their own unique experience with Keen.   


If you do buy two Keens, you can receive a $30 discount if you order from our website and use code SETOF2 during checkout.   If in doubt, and you decide to try buying one Keen first, and later do need to get another, you can write to us at support@habitaware.com, and we can assist with getting the second Keen discount at that time.