This year’s 128 Business EXPO will take place from 4 to 7:30 p.m., September 24, at The Westin Waltham-Boston Hotel. Participants will gain a competitive edge in sales, prospecting and networking while finding out about new products and services. More than 120 expo exhibitors represent a broad spectrum of products and services from many different industries throughout the region. Food sampling from a number of restaurants and free giveaways will be available.

Cost: Free. Location: 70 Third Ave., Waltham. For more information, call 781-894-4700, email [email protected] or visit WalthamChamber.com.