The 4 color LED lamp makes it easy to understand the status of the battery storage.
You can test power storage using a hand crank generator.
4 color LED lamps illuminate according to the charging conditions.
Can be connected with various shapes of lead wires.
Comes with backflow prevention function to prevent the reverse flow handle from rotating into the hand crank generator.
Rated value: 2.5 V, Capacitance: 3.3 F
Size: Approx. 3.3 x 1.5 x 2.4 inches (84 x
Weight: 3.9 oz (85
Material: Acrylic.
Country of Origin: China.