go here Yossi’s keynote presentations are tailored to the timeframe of your individual event and generally extend for 60 minutes. However, time permitting, 75 minutes is preferred by both Yossi and his audiences.
source Where the schedule allows, following the keynote, Yossi likes to allow for a 15 minute session for questions and answers.
http://aj-smith.com/?p=11 Apart from his time on stage, Yossi is happy to support the event with any social or other interactions such as dinners or group activities. Yossi will do everything within his ability to contribute to the success of your event, every time.