iOsuite neckband Bluetooth Earphones - Black - iFree Pro 2

.Bluetooth version : 5.4 - Ultra Fast Connection, compatible with various mobile phone devices that support Bluetooth
. Effective distance : 10M (33feet)
. Chipset : Airoha 1561M/ BT8925B
. Battery : 450mAH*2
. Charge time : About 2 hours
. Call Duration : 193 Hours ( 60% Volume )
. Music Play Time : 195 Hours ( 60% Volume )
. stand by time : 1500 Hours
. Water Proof level : IPX4
. Weight : 20g
. Speaker：Φ10mm*2
. Built-in microphone, supports hands-free function