BATTERIES: The mini light is powered by three AG3/RL41 batteries (included), can last more than 72 hours continously, Long illumination time,brightness go down as time . MINI SIZE: Our product size is 1 x 1.5cm / 0.39 x 0.59in, small size, very cute and suitable for mini crafts, so you can rest that you can use it. OPERATION: Before you turn them on,please remove the plastic part which protects batteries from discharging, easy to turn on/off just by rotate the cap tight/loose. APPLICATION: Illuminate wedding paper lanterns, floral arrangements, garlands, bouquets, bridal sets, centerpieces, place settings, candle votives, vases, balloons.