Feature: 1. For AC Generator: This automatic voltage regulator is used for AC generators with parallel excitation, very practical. 2. Wide Voltage Range: The AVR monitors exciter field current as a function of AC generator output voltage, with input voltage of 85‑139V. 3. Fuse Protection: The fuse will provide protection for electrical equipments, prevent being damaged from over current and overheating. 4. Quick Response: The response time of ±20% change amplitude of transient voltage is 500ms, safe and reliable. 5. Good Stability: Manufactured by exquisite workmanship, professional and standard, this AVR board has great stability. Specification: Item Type: Automatic Voltage Regulator Material: ABS Size: Approx. 14x7.5x5cm/5.5x3x2in Weight: Approx. 282g/9.9oz Voltage Adjustment: About ±0.5% Supply Range Voltage Detection: 85-139V (50/60Hz) Features: 1. Quick response time of ±20% change amplitude of transient voltage is 500ms 2. Voltage setting P1 3. Stability setting P2 4. 8A fuse for protection, slow action (supporting 10A, 10s). Package List: 1 x Automatic Voltage Regulator1 x Manual