Feature:1. High Brightness: Outdoor keychain light, using premium high bright wick, strong light illuminates a large range, convenient and practical.2. Detection Function: Can be used to detect jewelry, bowlder, jadeite, amber, invoices, stamps, paper money and other high grade valuable items.3. Button Battery: This keychain lamp has a built in button battery with a capacity of 150mAh and a long life of up to 10000 hours.4. Portable: This mini finger light is easy to carry and can be used on your finger or key chain without being easily lost, use with confidence.5. 5 PCS: The LED keychain flashlight set contains 5 finger lights, sufficient quantity, excellent performance, can last for a long time.Specification:Item Type: Keychain Finger LightMaterial: ABSGross Weight: 34g / 1.2ozProduct Size: Approx.40 x 23 x 7mm / 1.6 x 0.9 x 0.3in(lamp body only, not include key chain)Built in Battery: 2 CR2016 button battery 150mAh or 1 CR2032 button battery 150mAh (included, the two models are random, the capacity is the same, does not affect the normal use)Control: Switch.Package List:5 x Light