Size: 52x26mm Power: 0.25w Average Voltage: 0.45v Average Current:About 0.4A Effeciency: About 17% Connection way: the blue side connect “-” , white side connect”+”. If have any problems,Pls contact me first, don’t leave negative feedback and open dispute,thank you! because we will solve all problems . in order to ensure enough power,it is better to use solder strip , copper strips to connect. Package include: more 100pcs(if less 100pcs,pls contact us) Note: we can Customize the size for you as your requirement. Attention: some pieces panels come with spots on side as production process can’t avoid. (some pieces will as following photoes), But don’t worry, it works still perfectly on power and voltage…if you are professional on it,will be ok. If you very mind the appearance, PLS don’t buy it ,thank you!