2 PCS Electronic Accessories: 1 x Development Board & 1 x module This Solar charger provide you with the ability to get the most possible power out of your solar panel or other photovoltaic device and into a rechargable LiPo battery. Set-up is easy as well, just plug your solar panel into one side of the Solar charger and your battery into the other and you are good to start charging! The output of the Solar Charger is intended to charge a single polymer lithium ion cell. The load should be connected in parallel with the battery. By default, the Solar charge comes set to a maximum charge current of 500mA with a maximum recommended input of 6V (minimum 4.4V). It's recommended that batteries not be charged at greater than their capacity rating. module: This is a super mini Solar Lipo charger based on the CN3065 - a single lithium battery charge management chip. color: blue Material: PC + metal Solar panel input: 4.4-6V Max charge current: 500mA Interface: 2-pin JST connectors(or PH2.0) Short circuit protection Continuous Charge Current Up to 500mA Battery status indication ( Red : Charging , Green: Charged ) Support USB Charge (Micro-USB Connector) Size:2cm x 4cm Development Board: This board is suitable for firmware burning test of modules such as Essence ESP-12S/12F/12E/07S/07/01/01S. All IO ports have been exported and can be used as a minimum system development board or a small batch burning fixture. The board supports firmware one-click download function and adds programming Applicable: ESP-12S/12F/12E/07S/07/01S/01 Support one-click firmware download function Safe and reliable, small size, long service life And has power indicator light, burning indicator light, serial port communication indicator light Lead out all IO ports, which can be used as the smallest system development board or fixture for small batch programming Material:plastic colour:black Package Contents: 1 x Development Board 1 x module Only the above package content, other products are not i