[Charging Case With Reset Button]The charging case of TOZO A3 is equipped with a reset button. When you want to clear the existing paired device data of the headset, you only need to put the headset into the charging compartment and press and hold the reset button on the charging box for about 10 seconds to clear the paired device data of the headset; There is no need to clear the data from the paired device , you can re-pair the headset to the device you want. [Digital Call Noise Reduction]Equipped with the call noise reduction function that high-end headphones have, intelligently personalize noise reduction and sound performance for your ears, allowing you to enjoy deep, immersive sound, enabling you to communicate better when using headphones to communicate, avoiding loud sound brings bad call effect. [Long Lasting Battery ] TOZO A3 earbuds lasts 5 hours for normal use (50% volume) on a single charge,quick charging technology enables 1.5 hours of listening from just 10 minutes of charge,headphones + charging compartment can last up to 22 hours.the powerful battery allow for all day listening. which gives you excellent experience of long endurance. [Advanced Bluetooth 5.3 Technology & One-Step Pairing]TOZO wireless earbuds provide faster and more stable bluetooth 5.3 connection,this newest generation of bluetooth technology offers a strong, continuous connection as long as you’re within 30 feet of the paired device.and with one-step quick pairing, wireless earbuds will connect to the last paired device automatically with case opening.