Amazon Shure  
Shure SM81-LC Cardioid Condenser Instrument Microphone for Guitar, Piano, and Cymbals, Includes Swivel Adapter, Attenuator-Switch Lock, Windscreen, Carrying Case, No Cable Included (SM81-LC)
This microphone requires phantom power and performs best with a 48 Vdc supply (IEC-61938). However, it will operate with slightly decreased headroom and sensitivity with supplies as low as 11 Vdc. Most modern mixers provide phantom power. You must use a balanced microphone cable: XLR-to-XLR or XLR-to-TRS.
The SM81 is ruggedly constructed. It operates on phantom power and performs over a wide range of temperatures and humidity conditions. It is furnished with a swivel adapter, attenuator-switch lock, foam windscreen, and case for carrying and storage. Other accessories are available.
20 Hz to 20 kHz frequency response. Flat response curve for accurate reproduction of sound sources.
Low noise and high output clipping level. Low distortion over a wide range of load impedances.
Cardioid polar pattern, uniform with frequency and symmetric about axis, providing maximum rejection and minimum coloration of off-axis sounds
Low RF susceptibility
Selectable low-frequency response: flat, 6 or 18 dB/octave rolloff
0 dB/10 dB lockable attenuator switch
Rugged steel construction for durability. Field-usable over wide range of temperature and humidity conditions.
Cardioid condenser instrument microphone offers a wide frequency response and low self-noise. Features include flat response curve, low noise and high output clipping level, low distortion over a range of load impedances, and low RF susceptibility.
Shure SM81-LC Cardioid Condenser Instrument Microphone for Guitar, Piano, and Cy
Amazon Aprilaire  
Aprilaire 500M Whole Home Humidifier with Manual Control + Bypass Humidifier Installation Kit, Compact Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 3,000 Sq. Ft.
BUY WITH CONFIDENCE This humidifier was designed and manufactured in the U.S.A. by Aprilaire – the inventor of the whole home evaporative humidifier, and the leader in indoor air quality solutions
COMPLETE FURNACE HUMIDIFIER INSTALLATION KIT includes everything you need to install your new Aprilaire Whole Home, Manual Bypass Furnace Humidifier Models: 400M, 500M, 600M
FULL COVERAGE up to 3,000 square feet in tightly built homes with a capacity of 12 gallons per day
MANUAL HUMIDIFIER with a single sensor built into the standard control monitors indoor relative humidity for use in manually setting the percent humidity in your home
FEEL MORE COMFORTABLE while also preserving items in your home susceptible to damage from changing humidity or dry conditions
HUMIDITY FOR HEALTH Aprilaire Humidifiers can help you maintain optimal humidity in your home of 35% – 45% which has been shown to reduce the incidence of respiratory infections and symptoms related to allergies and asthma by minimizing the formation of bacteria and viruses, fungi, and dust mites. In addition, you’ll feel more comfortable while also preserving items in your home susceptible to damage from changing humidity or dry conditions
Aprilaire 500M Whole Home Humidifier with Manual Control + Bypass Humidifier Ins
Amazon GermGuardian  
GermGuardian Air Purifier for Homes with Pets, H13 Pet HEPA Filter, Removes Pet Dander, Dust, Allergens, Smoke, Pollen, Odors, Mold, UV-C Light Helps Reduce Germs, 22 Inch, White, AC4300WPT
HIGH PERFORMANCE AIR PURIFIER: Circulates the air 1x per hour in 743 square foot rooms and 4.8x per hour in 153 sq. ft rooms, ensuring thorough purification. Ideal for medium to large sized rooms such as: dorm rooms, bedrooms, and other living areas!
GENUINE HEPA PET PURE FILTER: Our Pet Pure HEPA Filter is designed to tackle pet dander, hair, and odors with exceptional efficiency, capturing up to 99.97% of harmful germs, dust, pollen, mold spores, and other allergens as small as .1 micron.
FIGHTS GERMS: Equipped with UV-C light technology, this air purifier helps reduce airborne viruses, such as influenza, staph, and rhinovirus, while also targeting volatile organic compounds (VOCs)
TRAPS ALLERGENS: Pre-filter traps dust, pet hair, and other large particles while extending the life of the HEPA filter
REDUCES ODORS: Activated charcoal filter helps to reduce unwanted odors from pets, smoke, cooking fumes, and more
ZERO OZONE CERTIFIED: Our air purifier is Ultraviolet - C (UV-C) enabled, providing an extra layer of defense, helping to reduce airborne germs such as Staphylococcus Albus, Escherichia Coli, Aspergillus Niger, and Phi-X174 as well as airborne bacteria and mold spores*
QUIET OPERATION: The lowest setting can be used as gentle white noise at night for a quiet, restful sleep
GermGuardian Air Purifier for Homes with Pets, H13 Pet HEPA Filter, Removes Pet
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