Description
These wireless earbuds feature 10mm speakers with a frequency response of 20 Hz to 20 kHz and an earphone sensitivity of 105 dB. The microphone has a sensitivity of -42 dB at 1 kHz/Pa, and the earphone impedance is 32 ohms. Equipped with Bluetooth 5.0, they provide a stable connection up to 10 meters. The earbuds use 40mAh lithium batteries, while the charging case holds a 500mAh lithium battery. Charging power is 5V/500mA, with earbuds fully charging in under 1.5 hours and the case in under 2 hours. Music playback lasts about 4 hours on a single charge and up to 22 hours with the charging case. The earbuds weigh 9 grams each, and the charging case weighs 32 grams. 
