Micro USB charging input with a voltage range of 5-9V for versatile charging options. Maximum charging current of 0.99A for efficient power delivery. Rechargeable 3.7V single-cell lithium-ion battery for long-lasting performance. Output voltage of 5V when not charging, ensuring stable power supply. When charging and discharging simultaneously, the output voltage is equal to input voltage minus 0.4V, providing reliable operation under various conditions. MICRO USB charging input: 5V (Charging input voltage range: 5-9V) Maximum charging current: 0.99A Rechargeable battery: 3.7V single-cell lithium-ion battery Charging voltage: 4.2V Output Section Output voltage: 5V (when not charging) Note: When charging and discharging simultaneously, the output voltage = input voltage - 0.4V Output current: 1A Color: Green Material: PCB Package Contents: 1*Lithium Battery Charging Module 1*Cable 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.