... .can pass FDA,SGS. Ion Power BandSpecificationItem nameion power bandItem NO. SM-SPB 004Material100% silicone,negative ionCertificateFDA;SGSDesignOEM&ODM,custom-made ... high quality&low price,fast delivery timeIon power band add negative ion,it's good for promote blood circulation,improve the ... quality of sleep Ion power band is hot sell design,OEM&ODM are ...