Keep Your AirTamer Cleaning at Peak Performance with the AirTamer A320W Personal Air Purifier Replacement Negative Ion Emitter Cartridge. Replaceable ion emission brush - restore operation to original condition even after many months of use with an easy to change emitter. Includes Power Boost Technology for Trusted Superior Cleaning Power.Power Boost Technology for 9 times more cleaning power. No Filters to Replace or Clean - Healthy negative ions do the filtering. Includes 1 White Negative Ion Emitter Cartridge. Keep your AirTamer A320 cleaning at peak performance with a new ion emitter. Over time, extensive daily use of your A320 can cause the black carbon ion emitter brush to shorten and become less effective. Build up of dirt can also reduce performance. Thankfully you can renew your A320 to its original performance by replacing the ion emitter cartridge.