UiiSii GM40 Pro TWS Earbud Bluetooth LED Displaybrand : UiiSiiModel : GM40 Pro Style: In-earResistance: 32ΩWireless Type: Bluetooth 5.1Frequency Range: 20 – 20000HzMax Output: 20mWBattery (Charging Case): Charging caseFashionable shape, light and compact, comfortable to wearOpen the lid to conn..