Grande Capacidade, _30_horas_long_battery_life, _support_mobile_phone_charging.built-in_dual_mic_delivers_clearer_and_more_real_talking_sound_in_stereo_mode. _bt5.0_chip_makes_to_understand_the_detail_of_voice_greatly.stereo_hifi_sound_quality, _acoustic_decoding, _stable_wireless_transmission, _continuous_sound.40mah_battery_in_each_earbud_provides_about_4_hours_of_music_playing_time. _the_earbuds_can_be_charged_automatically_in_the_1200mah_charging_box.led_battery_digital_display_can_clearly_show_the_battery_allowance_of_the_earbuds_and_charging_box. _charging_box_can_work_as_a_mobile_power_source_to_charge_mobile_devices.touch_control_design, _no_more_pressure_on_your_ears. _easy_to_control_music, _volume_and_calls, _and_activate_voice_assistant.especificações:nome Da Marca:_lenovonúmero_modelo: _qt81bluetooth_version:_bluetooth_5.0faixa De Transmissão: _10m/33ft_ (no_obstacle)unidade: _13mmfrequency_range: _20-20khzsensibilidade: _100_±_3dbimpedância: _32ωcharging_box_capacity:_5v_1200mahearphone_battery_capacity:_2* 5v_40mahmusic_playing_time:_about_4_hours_ (depending_on_music_volume)à Prova D'água: _ipx4cor: _black, _white_ (opcional)tamanho Do Fone De Ouvido: _approx_3.5*2.6*2.0cm/1.37*1.02*0.78inearbud_weight_ (cada) :_4g/0.14ozcharging_case_size: _approx._8.2* 5.3* 3.2cm/3.22*2.08*1.26incharging_case_weight: _73g/2,57 Ozpackage_size: _13,5* 10,5* 3,5 Cm/5,31* 4,13* 1,37 Polpackage_weight: _130g/4,58 Ozpacking_list:1_*_pair_of_earplugs1_*_charging_box1_*_type-c_charging_cable1_*_manual Do Usuário