Dive Alert Plus is a specially designed, small, lightweight pneumatic signaling device that uses quick connect hose fittings to become an integrated part of a diver's BCD power inflator. Installation is easy, and does not require any modification of your other equipment. Dive Alert Plus uses a small amount of air from your scuba cylinder to produce a loud sound that's audible both on the surface and underwater. 

Compatible with:  

• Aqua Lung AirSource
• Aeris AirLink 
• Mares AirControl  
• Oceanic Air XS