Post Surgery Compression Ear Band Post Surgical Otoplasty Compression Headband Ear Band Ear Compression Garment Wrap Bandage Unisex industrial_Oct2022 up to 4 degrees Rechargeable B09TCHDF2W up to 4 degrees Rechargeable AA AAA batteries come pre charged and ready to go Batteries will reach top performance after 3 5 times fully charge cycles Read more Use Environment Working temperature: 10 to +45℃ Storage temperature: 10 to +40℃ Relative humidity: ≤85% 8 Charging Indicator Lights Green: Fullly chargedRed: ChargingTwinkling: Battery is damagedOrange: Input voltage is too low Advanced Individual cell battery charger which make your charging easier and extend battery lifespan The smart charge function on chargers checks the charging conditions of the batteries Size: Mirror Diameter: 9 Post Surgery Compression Ear Band Post Surgical Otoplasty Compression Headband Ear Band Ear Compression Garment Wrap Bandage Unisex One size fits most