Celebrat W41 Tws Headset Wireless Earbuds

Connectivity & range wireless version: v5.3 working frequency: 2.402 ghz – 2.480 ghz transmission distance: ≥ 10 meters best working distance: 6 meters audio & sound performance drive unit: φ 13mm impedance: 32 ω ± 15% drive unit sensitivity: 113 db ± 3 db frequency response: 20 hz ~ 20 khz earbud battery & power built-in battery capacity: 50 mah music playback time: about 8 hours voice call time: about 5 hours standby duration: about 96 hours charging case specs charging box capacity: 180 mah box charging duration: about 1.5 hours input interface requirements: type-c dc 5v / 500ma compatible with iphone, ipad, android phones