... ENMN4018/RMN4048 3.Easy to Adapt to Most Open Face Helmets for the rescure works Power-Time ... for ENMN4018/RMN4048, Easy to Adapt to Most Open Face Helmets for The Rescure Works with following Features ... , portable and convenient, suitable for working in half-open or closed helmet, face cover or mask, and ... it easy to use, keying is possible even with gloves, under clothing or using the elbow, even by ...