2 WAY BUBBLES They help prevent the rod

They help prevent the rod from pulling out the alarm in the event of an extreme take

12 volt DC aeration system

Each unit is individually tank tested to assure highest quality

Technical Specifications

2 WAY BUBBLES They help prevent the rodPremium 3 Volt air pump with special 12 V DC adapter included An extremely quiet running pump Aerates up to 8 gallons Runs up to + 55 hours on 2 D cell batteries Pumps + 1. 2 STD min of air Impact and water resistant case with neoprene seals and rubber booted water proof switch. Weighted glass bead air stone with 30" of silicone air line tubing enclosed Large adjustable stainless steel clip for mounting Designed for fresh and saltwater use Each unit