Features: brand new and high quality for Smart Uninterruptible Power Supply (UPS). Supports 3A fast charging via Type-C socket. Adding 4 test pins enables powering between the X703 and the 4 without additional cables. For single 18650 Li-Ion battery only. Integrated battery for protection circuit. Integrated overcurrent for protection and overvoltage for protection. Onboard 4 green LED indicate battery charge and discharge levels 25%, 50%, 75% and . Onboard red LED shows battery charge or full status. Onboard button to control power on/off (Press ON, hold the button for at least 2s-OFF). Allows power input via Type-C socket or XH2.54 connector. Onboard 2-Pin PH2.0 connector allows connection of an external power switch. Software Safe Shutdown is not supported. Specifications: Colour: Black Material: PCB Size: approx. 10x6.5cm/3.94x2.56in Package Includes: 1 x UPS Expansion Board note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!