The Petzl Nao+ is brimming with features and offers superb performance for any outdoor application Offering 750 lumens of light output the Nao+ really does set the standard for the finest head torches The Nao+ differs to most other head torches by featuring reactive lighting which automatically adjusts the brightness and light output to your needs If you bring your map up to your face to investigate the route to your next camp the torch will automatically lower in intensity Glance back up and the torch will ramp the light output back up illuminating the distance The torch analyses the ambient light and instantly adjusts accordingly Perhaps even more impressive than the reactive technology are the adjustments which can be made remotely Thanks to the integrated Bluetooth when paired to the MyPetzl Light app on compatible devices beam pattern burn time and brightness can all be adjusted Whether you re preparing your final ascent on Mont Blanc heading up onto the moor for a quick run or orienteering through tricky terrain you can be sure you have the perfect head torch for the task ahead The app can also set the head torch up for constant lighting which delivers a steady output over a period of time for users who require or prefer this method of lighting The removeable and rechargeable 2600 mAh battery features a charge indicator and charges through the micro USB port The battery also features a red indicator light - an important safety feature for runners The Nao+ is crammed full of technology and is sure to be the perfect head torch whatever your activity may be MyPetzl Light App requires iOS 10 or later or Android 4 3 or later and is compatible with Apple devices iPhone 5C iPhone 5S iPhone 6 iPhone 6S iPad Mini iPad Air iPad Retina 7 4 iPhone SE iPhone 7 iPhone X iPhone Xr iPhone Xs Android devices ARCHOS AC45BHE Huawei Honor 5 Hawei Honor 7 HTC-one m9 LG G3 Meizu M2 Meizu M3S Nexus 6 Nexus 5 Nexus 7 Nexus 9 5 1 1 Samsung Galaxy S4-mini Samsung Galaxy S6 Samsung Galaxy Grand Prime Samsung Galaxy Tab 4 Samsung Galaxy Note 3 Samsung Galaxy S7 Samsung Galaxy Core Prime Samsung Galaxy J1 Galaxy Note 8 GT-N5110 Samsung S8 Samsung S9 Sony Xperia XA Samsung GT-S7710 Sony Xperia Z3 Sony Xperia ZR Xiaomi Redmi 5+