1Using for camping, easy to carry and store, convenient to use. 2Using lithium battery, capacity 2500mAh, long life, safe and stable, low self discharge rate, can used for remote signal indication. 3Waterproof and almost indefeasible, designed for rough operation and suitable for rain, snow or emergency situations. 4Made of high quality aluminium alloy material, sturdy, durable and long service life. 5Professional manufacturing, stable characteristics and high reliability.