KINGTOP Head Torch Rechargeable, LED Waterproof Headtorch with USB Rechargeable

Manufacturer KINGTOP. 90° - rotatable headlamp with elastic headband and lightweight battery box can be easily carried on the head. Light source type LED. Light source LED. Low battery warning light: Once the battery power is less than 20 %, the red warning light will start to flicker and the light will gradually turn darker, and it will work for another 30 minutes.

eBay