Specification: Color: black Material: Polysilicon Maximum power: 5.5 (W) Open circuit voltage: 13.5 (V) Working voltage: 12 (V) Short circuit current: 0.5 (A) Working current: 0-0.35 (A) Interface: Positive negative pole clamp Function: Outdoor emergency charging Product size: 21 * 16.5 * 0.8cm Feature: 1.Charging for your car battery, notebook computer or other 12V rechargeable battery designed with the solar power. 2., environmental and safe. 3.Great for outdoor work or travel or camping training. Note: 1. Be sure to note when using the product is negative and the positive must be consistent with the charging products 2. If no , please do not go trying to change the product 3. The products are used to trickle charge the car battery, it is mainly used to supplement the power that loss by the car battery self-discharge, so you can always start the car. Do not try to to no battery charging or charge the battery itself is shortage. Package Contents: 1 * solar panel 1 * positive and negative film (tape) Only the above package content, other products are not included. Note: Light 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.