: [For 18V Battery Light]The led bulb flashlight is only compatible for 18V lithium battery, like 48-11-1811, 48-11-1815, 48-11-1820, 48-11-1822, 48-11-1828, 48-11-1840, 48-11-1841, 48-11-1850 etc. [Safe to Use]Equipped with overload, over current, overheat, low voltage protection. that the battery will stop working when the battery voltage is lower than 21V, and use it with confidence to avoid over-discharge of the battery and damage to the battery Product parameters: Voltage: 13.5-21V Luminous flux: 350-1300LM Color temperature: 5500-6500K Power: 3.5-12W Installation interface: lithium battery interface Control system: Stepless speed regulation Note: Due to different production batches, the label words on the product are random. The actual product may have slight differences or color differences. This does not affect the applicability. Material: plastic fit & colour: A-for , Red Package Contents: 1 x Emergency small desk lamp (battery not included, please remember to remove the battery when not in use to in case of draining battery.) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.