Bluetooth 5.0 chip brings a 10M stable connection making transmission more stable and power consumption lower. The sound data is transmitted by the left and right earphones together, with intelligent noise reduction to make the sound stereo clear. With a wireless charging base, it is more convenient to charge. It also supports a Lightning charging interface with two charging modes for you to choose from. 350mAh large capacity portable charging case double earphone charging. The earphone is automatically connected by opening the cover of the charging case and the pop-up window shows the remaining battery of the earphone and charging case. Long-press either side of the touch area for 2s to call Siri, also support android smart assistant. Small and light earphones, 1:1 size makes you more comfortable, bringing you comfort from inside to outside. The Joyroom JR-T03S Bilaterial TWS Bluetooth Earbuds come with no Warranty.