Owleye Nano R Bike Tail Light, Green Owleye Nano bicycle taillights can be seen from almost 1 mile away (800 meters/.93 miles) Owleye Nano tail lights use Lithium polymer batteries than can be Solar recharged over 1000 times Nano taillights are 100% Solar rechargeable. A full charge of 1.5 hours yields of Solar charging yields 2.5 of steady and 10 of flashing light light Nano taillights weigh just 12 grams and have a simple no tool strap mount Water resistant