Electric Single Phase Smart Electric Digital AC Hz Frequency Meter. 3-Year Warranty: Comprehensive 3-year warranty coverage for all units. OEM & ODM Support: Full customization available from samples, designs, or flexible requirements. RS485 Interface: Enables convenient data exchange with microcomputers and PLCs. High Accuracy: Accuracy class 0.5 ensures precise frequency measurement. Wide Voltage Range: Measures AC/DC 80V~270V and AC220V effectively. Durable ABS Material: Constructed with high-quality ABS for long-lasting performance. CE & ISO9001 Certified: Meets international safety and quality management standards. Low MOQ: Minimum Order Quantity is just 1 piece for flexible purchasing.