Bt_5.1_technology_provides_high-speed_data_transfer_rate _stable_performance_and_low_power_consumption. _with_true_wireless_stereo_technology _you_can_use_the_headphones_alone_or_in_pairs. _equipped_with_a_300mah_charging_box_to_store_and_charge_the_earphones. _built-in_microphone_brings_clearer_and_more_realistic_sound. _it_will_bring_you_a_perfect_user_experience.bt_5.1_technology_provides_higher_data_transfer_speed _more_stable_and_faster_connection_and_lower_power_consumption.true_wireless_dual-ear_design _the_left_and_right_earphone_channels_are_separated. _ele_pode_ser_usado_sozinho_ou_em_pares.auto_power_on_and_quick_pairing_between_left_and_right_earbuds_once_the_charging_case_cover_is_opened. _easy_and_quick_to_pair_with_bt-enabled_audio_devices.touch_control_design _no_more_pressure_on_your_ears. _easy_to_play_music_and_calls _and_activate_the_voice_assistant.the_built-in_microphone_on_both_noise-canceling_earphones_enables_hands-free_calling_and_clearer_conversation_sound_in_stereo_mode.a_300mah_charging_case_can_charge_and_store_the_earphones._30mah_battery_in_each_earphone_provides_about_4_hours_of_music_time.especificaçõesbrand_name_lenovomodel_number_xt95_probluetooth_version _5.1transmission_range _up_to_10m_ (without_obstacles)unit_diameter _13mmfrequency_range _20-20khzsensibilidade_109db ± 3dbmicrofone_ Sensibilidade _-42db_ ± _1dbimpedância _32ωcharging_case_battery_capacity_5v_300mahheadphone_battery_capacity_ (cada) _5v_30mahmusic_play_time_about_4_hours_ (depending_on_music_volume)headphones_charging_time_about_1.5__horascharging_box_charging_time _about_2_hourscor _preto _branco_ (opcional)estilo _standard_version _luminous_version_ (opcional)earbud_weight_ (cada) _3.5g_/_0