Features: brand new and high quality I2C bus communication, monitoring the battery voltage, current, power, and remaining capacity in real for time. Multi battery for protection circuits: over charge/discharge for protection, over current for protection, short circuit for protection, and reverse for protection, along with the equalizing charge feature, more safe and stable. Onboard recharging indicator, power indicator, and battery warning indicator to check if the battery is connected correctly. Battery support: 800mAh 14500 Li-ion battery. Standard Pico header, supports Pico series boards. Uninterruptible Power Supply (UPS Module)for Pico,Keeps your Pico running while recharging, monitoring battery status via I2CIncorporates Li-ion battery switching charger with dynamic power for path management, more stable power supply. Specifications: Material: Metal Recharge Voltage: 5V Control Bus: I2C Size: Approx. 60 × 21mm/ 2.36x0.82in Battery Support: 14500 Li-ion Battery (NOT included) Package Includes: 1x Pico-UPS-Module note: It does NOT include Battery. Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.