Charge module: Linear charging.<br />Current: 1A adjustable.<br />Charge precision: 1.5%.<br />Input voltage: 4.5V-5.5V.<br />Full charge voltage: 4.2V.<br />Led indicator: red is charging blue is full charged.<br />Input interface: mini USB.<br />Work temperature: -10★ to +85★.<br />Inversed polarity: NO.<br />Size: small to 25X19X10mm.<br /><br />Package included:<br /> 1 X 5V Mini USB 1A Lithium Battery Charging Board Charger Module