Bluetooth Version?V5.0 Earbud dimension: 30*18*30mm*2 Charging case dimension: 52.8*34.6*62.9mm Weight: 6.4g*2(Earbud) 39g/(Charging case) Wireless working range: 10M (without obstacles) Speaker: ?10mm*2 Impedance: 16??15% 1kHz Speaker frequency: 20Hz?20KHz Input voltage / current: DC 5V/200mA Earbud Battery: 50mAh*2(Fully charged in 1.5H) Charging case battery: 450mAh Play time: 3H Talk time: 3H Charging time: 1.5H