Bt_5.1_technology_brings_high-speed_data_transfer_speed, _stable_performance, _and_low_power_consumption. _with_true_wireless_stereo_technology, _you_can_use_the_headset_alone_or_use_them_in_pairs. _equipped_with_a_300mah_charging_box_to_store_and_charge_the_earbuds. _built-in_microphone_delivers_a_clearer_and_more_realistic_sound. _it_will_bring_you_a_perfect_user_experience.características:bt_5.1_technology_ensures_high_data_transfer_speed, _stable_and_fast_connection, _and_low_power_consumption. Just_take_the_earbuds_out_of_the_charging_box, _and_they_will_pair_with_each_other_automatically.touch_control_design, _no_more_pressure_on_your_ears. _easy_to_play_music_and_calls, _and_activate_voice_assistant.microphone_embutido_on_both_earbuds_delivers_clearer_talking_sound_in_stereo_mode, _supporting_hands-free_calling.led_battery_digital_display_can_clearly_show_the_battery_allowance_of_the_earbuds_and_charging_box.especificações:marca:_lenovonúmero_modelo: _xt82bt_version:_5.1faixa De Transmissão: _up_to_12m_ (no_obstacle)unidade: _φ13mmfrequency_range: _20-20khzsensibilidade_microfone:_-42db_±_3dbimpedância: _16ωcharging_case_battery_capacity:_3.7v_300mahearbuds_battery_capacity_ (cada) :_3.7v_30mahmusic_playing_time:_about_4_hours_ (depending_on_music_volume)earplug_charging_time: _about_1_hourheadphone_box_charging_time: _about_1_hourcor: _black, _white_ (opcional)tamanho Dos Fones De Ouvido: _approx._2.8*2.5*1.7cm/1.10*0.98*0.67inearbud_weight_ (cada) :_4,4 G/0,15 Ozpackage_size: _14,0* 9,0* 4,0 Cm/5,51* 3,54* 1,57 Polpackage_weight: _89g/3,14 Ozpackage_list:1_*_pair_of_earplugs1_*_charging_case2_*_pair_of_earcaps1_*_carregamento_cabo1_*_user_manual_ (inglês/chinês)