Enhance your radio frequency measurements with this advanced DIY Digital Standing Wave Meter, designed for precision and convenience without the need for an external power supply. Crafted with a durable aluminum alloy body and equipped with a built-in 1000mAh polymer lithium-ion battery, this portable SWR meter offers reliable performance and ease of use for amateur radio enthusiasts and professionals alike. Key Features: · **No External Power Required**: Features an integrated rechargeable battery with Type-C charging interface, enabling cordless operation and true portability. · **Comprehensive Digital Display**: Clearly shows forward power, reflected power, antenna power, antenna efficiency, standing wave ratio (SWR), and battery voltage for real-time monitoring. · **High Accuracy Measurement**: Provides measurement accuracy within ±5%, suitable for precise tuning and diagnostics of antenna systems. · **Wide Power and Frequency Range**: Supports power measurements from 0.5W up to 120W (with capability up to 200W), and frequency coverage from 1.8MHz to 50MHz, accommodating various modes including FM, AM, CW, and optional SSB. · **User-Friendly Alerts and Indicators**: Equipped with buzzer alarms for high SWR and low battery voltage, plus multi-color LED indicators—red for charging, green for full charge, and yellow for undervoltage—to keep you informed at a glance. · **Robust Construction**: The aluminum alloy casing ensures durability and long-lasting use in various environments. · **Convenient Access Interface**: Includes a standard SO239 connector for easy integration with your radio equipment. Specifications: · Material: Aluminum Alloy · Color: Black · Battery: Built-in Polymer Lithium-ion Battery 503450, 1000mAh capacity · Charging Interface: Type-C · Frequency Range: 1.8MHz – 50MHz (reference value applicable for V band) · Power Range: 0.5W – 120W (up to 200W peak, long-term testing recommended below 120W) · Measurement Accuracy: <±5% · VSWR Range: 1.0 – 99.99 · Access Interface: SO239 Package Includes: · 1 x Digital Standing Wave Meter This digital standing wave meter is an essential tool for anyone working with antennas and radio transmitters, offering precise measurements, easy portability, and intelligent alerts to optimize antenna performance and ensure efficient transmission.