<p>When you have a charger, data cable, or power bank, you may have these questions: Is the charger really outputting the power as described? If the charger is not original, will it overcharge or overload my cellphone? Is this cable capable of delivering 1.5A or 2A as needed? Does the power bank really have the capacity as stated? Now you can have a portable and easy-to-use device to find the answers. You can test various USB-powered electronic devices with this tool. Features - Color: Black - Material: Plastic - Size: 6 x 2.8 x 1 cm / 2.4 x 1.1 x 0.4 inch - Input: 4–30V / 50mA–3000mA - Output: 4–30V / 50mA–3000mA - Capacity: 0–19999mAh - Measures current and voltage of phones, power banks, and other USB devices - Equipped with a USB port and micro USB interface for convenient device testing - Features an LCD screen to clearly display current and voltage readings - Compact and lightweight design for easy portability</p>