Features: Work Principle: This kind of air freshener works with negative ion technology which provides you with fresh air by refreshing the dust and smog in the air making you feel more comfortable when breathing. Wearable: This portable negative ion generator is easy to store and carry because you can wear it on your neck or clip it on the collar not easy to slip or fall off when doing sports you can use it without worries. Rechargeable: This ionizer can be used for a long time after fully charged because it has a built-in 250mAh you do not need to charge it frequently. Low-noise: This air freshener works with a sound within 36dB which is not easy to disturb your work or study suitable for home office car sports and other places and occasions. Long-lasting: This smog remover is made of plastic material durable and reliable you can use it for a long time because it is not easy to be broken or cracked. Specification: Material: ABS electronic components Color:Pink red Size: approx. 78*40*20MM/3.07x1.57x0.79inch Control: button control Noise: 30dB Battery: built-in 300mAh Duration time: about 24h Power supply: USB Suit area: within 10 Blowing rate: 50m3/h Anion density: 1200W/cm Power: 1W Voltage: 5V Charging Time: 2-3h Note: Due to the light and screen difference the item\\'s color may be slightly different from the pictures. Please allow a slight deviation for the measurement data and make sure you do not mind before ordering. includes: 1*Air Freshener 1* Charging Cable 1*Instruction