description: brand new, high quality feature: BQ25570 is a highly integrated energy harvesting for nano power management solution, ideally suited to meet the specific needs of ultra-low power applications. This product is designed to efficiently capture and manage power from microwatts (W) to milliwatts (mW) from a variety of different for DC power sources such as photovoltaic (solar), thermoelectric generators and piezoelectric modules. parameter: Module power voltage input: DC0.1V-5.1V Output voltage BAT \ OUTPUT: 2V-5.5V Working environment temperature: -40 C ~ 85 C specification: Size: 2.7x2.8cm / 1.06x1.10in Color: purple Transition: 1cm = 10mm = 0.39inch. Due to manual measurement, please allow 0-1 for cm error. Before you bid, make sure you do n'for t mind. Due to differences between monitors, the picture may not reflect the actual colors of the item. Thank you! The package includes: 1x converter (Other accessory demos are not included in the figure.)