Petzl - https://www.asmc.de/products/blood-group-patch-blood-group-b-neg

The Petzl Aria 2 headlamp is a powerful compact headlamp that offers optimal comfort at work. The wide, homogeneous beam provides better visibility in the immediate surroundings, thereby reducing the risk of accidents. The mixed beam also makes movement easier. This robust headlamp is dustproof and waterproof, so it can be used even under extreme conditions. It is ideal for professional use in trades, maintenance and numerous work situations.
The Petzl Aria 2 headlamp is characterized by simple operation using a single switch. The tilt angle of the lamp can be adjusted via the mounting plate, and the LED indicator shows the remaining battery life when switching the lamp on and off. In addition, the LOCK function prevents it from being switched on unintentionally during transport or when the lamp is not in use.
The Aria 2 can be worn on the head or around the neck, or attached to any type of helmet using the mounting systems available as accessories. The removable and washable headband with symmetrical adjustment ensures a comfortable and secure fit. The lamp is supplied with three batteries, but thanks to the HYBRID CONCEPT it can also be operated with a CORE rechargeable battery. The lamp automatically detects the power source and optimizes the light output accordingly.

- Certification(s): CE, UKCA
- Waterproof: IP67
- Impact resistance: IK07 (EN/IEC 62262)
- Drop resistance: 2 meters (ANSI/PLATO FL 1)
- Power options: 3 AAA/LR03 batteries (included), CORE battery

Light output of the three white-light levels with three AAA/LR03 batteries according to the ANSI/PLATO FL 1 standard:
- Max. burn time (light mode): 7 lumens (light output), 10 meters (beam distance), 100 hours (runtime)
- Standard (light level): 100 lumens (light output), 60 meters (beam distance), 10 hours (runtime), 20 hours (reserve light)
- Max. power (light level): 450 lumens (light output), 100 meters (beam distance), 2 hours (runtime), 20 hours (reserve light)

Luminous output of the three white-light levels with CORE battery according to the ANSI/PLATO FL 1 standard:
- Max. burn time (light mode): 7 lumens (light output), 10 meters (beam distance), 100 hours (runtime)
- Standard (light level): 100 lumens (light output), 60 meters (beam distance), 7 hours (burn time), 2 hours (reserve light)
- Max. power (light level): 600 lumens (light output), 115 meters (beam distance), 2 hours (runtime, reserve light)