i20 tws bluetooth 5.0 headset call siri auto power on pairing hifi binaural call wireless earphone auriculares earbuds headphone

model: i20 bluetooth headset bluetooth scheme: v5.0, supports binaural calls horn: true copper ring loudspeaker chip: true stereo chip play time: 3-4 hours standby time: 15-20 days call time: 8 hours headset battery capacity: pure cobalt 55 ma charging box battery capacity: pure cobalt 500m