Helmet Bike Bicycle Safety Signal Warning Motorcycle Helmets led LED Helmet Strip Light Aircraft Strobe Exterior (Multicolor) Pack of 1Smaller Size & Brighter Lights: Only weights 6g, super light weight, won't cause extra burden to the drone and takes the space to the bike. USB Rechargeable Battery waterproof. Long press (2 seconds) to switch the machine, short press to adjust the mode. Charging voltage: 3. 7v Working voltage: 2. 6 4. 2v Built in lithium battery capacity: 200MAH. This LED aircraft strobe light has been tested for water resistance. The light can be charged via a