LS-758 X-Power Booster™ Lid
Located on the lid of every LS-758 is the safety locking arm and safety switch.
This must be engaged before the machine will work and is an amazing feature to have Blenders are one of the most dangerous appliances in a kitchen, so having a safety lock and switch in todays world is not only sensible but compliant with occupational health and safety standards.
Given most commercial blenders do not have this feature the LS-758 X-Power Booster™ Pro-Series Extractor is a leader in this area.
Remember the lid MUST be fully locked before it will work.