Description: Let You Breathe Healthily: This personal air purifier produce negative ions, negative ions can condense fine particles, and the harm to human body will be greatly reduced after small particles are condensed into large particles, let you enjoy healthy breathing, 36h Long Time: Rechargeable, mini, no-noise and portable ion necklace stylish design, and 36h battery life continuous protection, make sure It can continuously create a clean, good air area in tourism, public places or other places with poor air quality. Let the fresh air always accompany you Compact and Lightweight: Our pure air purifier has a compact and lightweight design that allows you to carry it anywhere you go. The device is modern, delicate, and makes a unique accessory that is both practical and super stylish. No Noise & Digital Display Screen: The sound is very quiet during operation, and will not disturb you during work or rest. Temperature and humidity detection display screen. Perfect Gift: The clever and stylish design makes it blend well with whatever you are wearing. The Modern Stylish Chic Design makes it blend well with whatever you are wearing. Specification: Material: Plastic Size: Approx. 28x66.6x18.1mm/1.10x2.62x0.72inch Working Voltage: 5V Battery Capacity: 240mAh Endurance Time: about 36h Charging Time: about 2h Package Includes: 1x Manual 1x Typc Cable 1x Mini Air Purifier 1x Metal Lanyard 1x PU Lanyard Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you.