Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Features: 1. Adopt Spring Thimble Interface Design, Suitable For Raspberry Pi3/3B+/4B Motherboard 2. Onboard Lithium Battery Charging Chip Supports Dynamic Path Management And More Stable Power Supply 3. Onboard Boost Chip Can Provide Stable 5v Voltage Output 4. It Can Communicate Through The I2C Interface To Measure Parameters Such As Battery Voltage, Current, Power And Remaining Power, And Detect The Working Status Of The Module In Real Time; The Onboard Battery Protection Circuit Prevents Overcharge, Overdischarge, Overcurrent And Short Circuit, Making The Work Stable And . 5. On-Board MCU Chip Management, Supports Power-On Detection Startup Function; Supports Battery Power Display, Easy To Check Battery Status; On-Board Charging Indicator Light, Easy To Check Battery Working Status Description: 1. Output Voltage: 5V 2. Control Interface: 20 3. Battery Specifications: 5000mAh 21700 Battery X2 (Parallel Connection) (Not Included) 4. Charging Power Supply: 5V (Type-C Interface) 5. Product Size: About 56 x 85mm 6. Through Hole Diameter: 3.0mm Material: PCB Color as shown Package Contents: 1 Supply Module 1 x Acrylic Cover 1 Set Of Screw Package Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.