Quick overview from the supplier:
Gembird BTHS-M-01 Bluetooth call center headset with built-in microphone, mono, Bluetooth v5.0, LED, up to 12 hours on a single charge, distance: up to 10 m, Headset battery: 150 mAh Li-Polymer (charging up to 1.5 h), Charging base: 500 mAh Li battery, USB Type-C charging port, 173g, black
