Note:The EW03 plus model is an upgraded version, Bluetooth 5.1, does not support pop-up windows and pop-up power display. Includes headset charging data cable.The EW09 model is Bluetooth 5.1, does not support pop-up windows and pop-up power display, includes headset charging data cable, in-ear noise reduction function. EW03 Plus True wireless BT headseBluetooth 5.1, chip: JL AC6973 Battery capacity: charging compartment 200mAh, earphone 30mAh Talk/music time: 4 hours, 200 hours standby Size: 44.3*44.3*21.5mm; Net weight: 36g Support master-slave switching, call Siri, modify pairing name, touch operation, do not support pop-up window 6, with charging cable EW09 Soundman true wireless BT headset, Bluetooth 5.1, chip: JL AC6973 Battery capacity: charging compartment 300mAh, earphone 30mAh Talk/music time: 4 hours, standby 120 hours Size: 55*44*22.5mm, total weight: 40g 5. Support master-slave switching, summon Siri Note:The EW03 plus model is an upgraded version, Bluetooth 5.1, does not support pop-up windows and pop-up power display. Includes headset charging data cable.The EW09 model is Bluetooth 5.1, does not support pop-up windows and pop-up power display, includes headset charging data cable, in-ear noise reduction function.If any doubt is not clear, please contact the shop staff for consultation[HOCO Official flagship store]