Item Type: Thumbs Lamp Material: PVC Product Size: Approx.4.5cm / 1.8in Battery (shipped with Built in Battery) : 1 x Cr1220 Button Battery, 3v, 40mah Applicable Age: for Above 14 Years Old Weight: Approx. 85g / 3.0oz Package List 5Pairs x Thumbs Lamp 1Thumbs Lamp: Can pass light from one hand to the other, making it disappear and reappear in various effects. 2Easy To Use: Open automatically when inserting the tip of the finger, close when removing, turn on the light secretly under pressure from the tip of the thumb, easy to use. 3Simulation Design: Using fine workmanship, with simulation design, it is vivid, lifelike, exquisite. 4Premium Materials: Made of premium PVC, durable, not easy to wear, not easy to damage, safe to use. 5Wide Applications: Works on most thumbs and fingers. It can be used for Halloween, concerts, nightclubs and performances.