This useful little gadget is used to measure and display voltage and current. The display cycles automatically on connection to the power source.
May be connected in series (in-line) between your flight pack (eg. 2-6S LiPo) and ESC to determine whether the pack is holding up under load and also to monitor the current drawn by the power set up to a maximum of 30A.

Features:
Compact and extremely portable
Suitable for RC various battery
High quality and durable in use
3-digit LED display
Soft-sheathed silicone cable

Specification:
Input voltage range: 5 to 25V
Max current: 30A
Voltage tolerance: ±0.1V
Current tolerance: ±0.1A
Dimension: 40 * 20 * 10mm
Weight: 18