How to raise the speaker
1. Put the speaker on the pole
2. Loosen the locking knob
3. Press down the hand clutch and the speaker pole will raise up easily.
4. Tighten the locking knob. 

How to lower the speaker
1. Loosen the locking knob.
2. Pull down on the speaker.
3. Take the speaker off of the pole.

The air assist technology is something every sound person and musician should own. It makes it extremely easy and convenient to place speakers on stands.

Features:

• Rockville RVSS4A Tripod Speaker Stand With Air Lift and Lowering System
• Hydraulic System Makes Raising and Lowering The Speaker Quick, Painless, and Safe
• Air Assisted Lift allows the speaker stand to raise with the push of a button
• Air Assist lowering system lowers the speaker for easy dismounting with the push of a button
• Easy Hand-Clutch Mechanism For Air Powered Lift
• Easy Hand-Clutch Mechanism for Slow Air Powered Decline/Lower
• Built in Pole Track Mechanism To Keep Speaker Pole From Rotating
• Adjustable Height 42" - 79" inches
• Heavy Duty Steel and Aluminum Composite Construction
• Lightweight construction allows for easy maneuverability and travel
• Color: Black
• Weight Capacity: 154 lbs
• Base spread: 0 - 23inches
• Tube Diameter: 1.38 inches
• Leg Diameter: 1.38 inches

The Rockville Difference:
Whenever you see the Rockville shield on a product you know that it has the stamp of approval. While other companies simply import products from China, Rockville manufactures the products in China to lower your cost but do so under American style supervision and quality standards to get you that USA quality that you want!

About Rockville Quality Control Procedures:
The Rockville brand stands for Quality, Innovation and Value. All Rockville products go through the most rigorous quality control standards in the industry. Products go through months of extensive testing before they reach your hands. All user functions are tested and all internal components are tested for quality. Rockville makes products that are virtually un-breakable! Rockville is one of the only brands in its class to test every concept model for weeks or months before starting production. Once production begins, Rockville sends product engineers to their factory to quality control every line of production. During production every product is tested and on top of that Rockville goes the extra mile and has their high level product engineers do an additional quality control. They test a certain percentage of all products from the production line a second time to ensure that the quality meets their vigorous standards, and to make sure that there is never a batch of products with even a slight problem. All Rockville products are backed with a hassle free warranty, though it is unlikely that you will need to use it.

Great features and great quality make Rockville a great choice.