Feature Highlights: 1. Clear LED Display – Easy-to-read digital screen shows measurement data at a glance. 2. Wide Frequency Range – Measures from 1Hz to 50MHz, perfect for testing commonly used crystals and oscillators. 3. Auto-Ranging & Programmable Settings – No manual range switching needed; supports adjustable positive/negative frequency settings for radio transceiver testing. 4. Multiple Power Options – Works with USB, external power supply (5–12V), or a 9V battery for flexible use anywhere. 5. Smart Power-Saving Design – Display turns off automatically after 15 seconds of inactivity to conserve energy. 6. Transparent Protective Case – Clear housing keeps components safe while letting you see the inner workings. 7. Five Precision Modes – Offers selectable accuracy levels for different measurement needs. Product Details: This DIY frequency tester kit is designed for electronics enthusiasts and makers. It can measure signal frequencies up to 30V and is ideal for checking crystal oscillators, circuit debugging, and manufacturing applications. The kit comes unassembled—perfect for those who enjoy hands-on building. Assembly is straightforward, but please note: anti-static gloves are recommended during installation to protect components. Specifications: - Product Name: DIY Frequency Tester Kit (Unassembled) - Measurement Range: 1Hz–50MHz - Max. Signal Frequency: 30V - Power Supply: USB / External Power (5–12V) / 9V Battery - Display: LED Digital Screen - Housing: Transparent Case - Material: PCB + Electronic Components - Included: 1 × DIY Frequency Tester Kit (Other items not included) Note: Slight color variations may occur due to lighting or screen differences. Measurement tolerance is approximately ±1–3cm. This is a DIY kit and requires assembly; no finished product is provided.