OLED Multifunction Tester Voltmeter Ammeter 99V/10A Digital Meter

Meet your all-in-one electrical monitoring solution — the OLED Multifunction Tester. This compact digital measuring instrument displays voltage, current, power, temperature, time, capacity, and energy consumption on a crisp OLED screen, giving you real-time, at-a-glance data for DIY electronics, battery management, solar setups, and more.

Made in Mainland China.

Key Features

• 7-in-1 Measurements: Simultaneously tracks Voltage, Current, Power, Temperature, Time, Capacity (mAh/Ah), and Energy (Wh) — all on one bright OLED display.
• Wide Range: Available in 33V/3A, 33V/10A, and 99V/10A variants — suitable for a wide range of DC applications.
• OLED Display: High-contrast, easy-to-read screen performs well even in low-light environments.
• Built-in Button Controls: Onboard buttons allow simple data management, reset, and error correction for component aging or temperature drift.
• Durable ABS Housing: Lightweight yet sturdy black ABS enclosure built to withstand regular workshop use.
• Versatile Power Supply Compatibility: Supports isolated power supplies up to 20V or a common cathode DC-DC converter.
• Easy Installation: Follow the included wiring diagram for correct setup. Ensure the black thin wire is properly insulated to prevent short circuits.

Specifications

• Display: OLED
• Voltage Range: Up to 99V (model dependent)
• Current Range: Up to 10A
• Material: ABS
• Color: Black
• Battery: Not included / Not required (wired instrument)
• Measurement Error: ±1–3% (typical for digital instruments in this class)

What's in the Box

• 1 × OLED Multifunction Tester (99V/10A)

Note: Due to different production batches, minor differences in product appearance or printed text may occur — functionality is unaffected. Colors may appear slightly different on-screen due to display settings and lighting conditions.

Ideal For

• DIY electronics and hobby projects
• Battery charging and capacity testing
• Solar panel and renewable energy monitoring
• Power supply bench testing
• RC vehicles and drone power systems

For general guidance on safe practices when working with electrical measuring instruments, visit the OSHA Electrical Safety Resource.

Frequently Asked Questions

Q: What parameters does this OLED multifunction tester measure?

A: This digital measuring instrument tracks seven key parameters simultaneously: Voltage (up to 99V), Current (up to 10A), Power (Watts), Temperature, Time, Capacity (mAh/Ah), and Energy (Wh). All readings are shown clearly on the built-in OLED display.

Q: How do I install and wire the OLED multifunction tester?

A: Follow the wiring diagram included with the unit. Connect it in line with your DC circuit. Use an isolated power supply of up to 20V or a common cathode DC-DC converter. Always ensure the black thin wire is insulated to prevent any short circuits before powering on.

Q: Is this tester compatible with solar or battery systems?

A: Yes! The OLED multifunction tester is well-suited for monitoring battery charging cycles, tracking capacity (mAh), and measuring energy throughput (Wh) in solar, lithium battery, and other DC power systems — making it a popular choice for renewable energy hobbyists and DIY builders.

Q: What is the difference between the 33V/3A, 33V/10A, and 99V/10A versions?

A: The key differences are in maximum voltage and current ratings. The 33V variants handle lower-voltage applications up to 33V, while the 99V/10A version supports higher-voltage DC systems up to 99V at 10A. Choose based on the voltage range of your specific project or power system.