Features: Available in 4 standard models: 100A, 200A, 300A, and 500A; select based on your requirements. Real-time display of voltage, current, power, capacity, energy, temperature, and operating time. Offers over-power, over-voltage, under-voltage, over-current, and over-temperature protection via a reserved relay interface. Supports two-way current detection for convenient monitoring of charge and discharge currents without rewiring. Power outage memory function retains ampere-hour (Ah) data before power loss for continuous observation and measurement. Ampere-hour (Ah) value can be reset or cleared with a single button press without affecting charge or discharge measurements. Specifications: Material: Plastic and Metal Shunt head dimensions: approximately 42 x 78 x 25mm (1.7 x 3.1 x 1in) Shunt module dimensions: approximately 49 x 86mm (2 x 3.4in) 6P blue and white wire length: approximately 200mm (8in) Packaging dimensions: approximately 13 x 8.2 x 9.2cm (5 x 3 x 3.6in) Available in 100A, 200A, 300A, or 500A options Supports online calibration for easy error correction over time. LCD screen automatically turns off and on to reduce power consumption. Features switching voltage and current waveform display for intuitive observation of voltage and current changes. Relay port can be switched to buzzer port to enable ble alarm function. Undervoltage capacity resets automatically; overvoltage capacity fills automatically to support long-term reuse and automatic error correction. Note: Allow 1-3cm variation due to manual measurement. Verify dimensions before purchase. Product color may vary slightly due to monitor display differences. Package includes: 1 x Battery Monitor