(4 Pack) Anion Air Purifier with LED night light. This newest Ionic Air Purifier, Anion Ionizer, Air refresher cleaner with SGS Test Report of Ion detected range: 1 &ndash; 1,236,000 single/c.c.. Designed in Japan. This direct plug-in Purifier for your home or office recharges your mind and body while eliminating odors, dust and pollen. Anion (negative charged ion). (4) SETUP: Easy to set up. Just plugs into wall socket. It stars to work while your plug in. DIY Instruction is included. COVERAGE: Effective for up to 175 square feet, no noise, no odor, no chemicals. USAGES: Can be used for 24 hours 7 days a week. MAINTENANCE: Maintenance free. No cleaning, no filter required. LED LIGHT: Best blue LED night light. With free plastic sticker to lower the brightness.