This product adopts a conversion , which doubles the working current output of solar energy under the same area and power. It can provide good performance even in low light conditions, and the internal diode can prevent leakage at night. Advanced packaging materials and multi-layer laminations have improved battery performance and extended its lifespan. The module can withstand high wind pressure, snow load, and extreme temperatures. Mainly used for charging and recharging automotive batteries Waterproof grade: IP65 Solar conversion rate: 22% Maximum power: 10W Working voltage: 18V Open circuit voltage: 21.5V Working current: 0.55A Short circuit current: 0.63A Net weight of product: 350g NOCT (nominal operating temperature of battery): 40℃-85℃ Working temperature: -35℃-60℃ Colour:Black Material:Monocrystalline silicon Size:285x265x2mm Package Contents: 1 x solar panel 4 x suction cups 1 x car charger 1 x battery clamp 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.