NAGAOKA Bluetooth 5.0 Compatible Aluminum Housing Wireless Earbuds BT821 Black

Bluetooth version 5.0, communication distance up to approximately 10m, standby time 120 hours, talk time 4 hours, music playback time 5 hours, charging time approximately 2 hours, driver 10mm, sound pressure sensitivity 42dB, playback frequency range 20-20000Hz, music playback time 5 hours, charging time approximately 2 hours, impedance 16Ω