Model: K505 Bluetooth version: 5.4 Color: All colors shell Earplug battery: 40mAh Charging case battery: 300mAh Charging time: 1-2 hours for charging Voltage: 3.7V Input voltage: 5V Transportation packaging: gift box packaging Specifications: CE, RoHS, FCC certification Trademark: AiL Origin: Shenzhen, China HS code: 8517629900 Capacity production time: 500000 pieces per month