Remote Wireless High Voltage Phase Detector applied to electric power lines below 500KV, high voltage switchgear (metalclad withdraw switchgear, ring main unit, etc.) or substation remote phase detecting, phase test, phase sequence judgment and electricity inspection, etc. 1. Model No.: ETCR1500A 2. Phase Detection Mode: Contact & Non-contact Mode 3. Phase Detection Voltage: AC 10V~500kV 4. Satellite Phase Detecting Distance: 5000m 5. Normal Phase Detecting Distance: 260m 6. Power Supply: Host: 3.7V, 2600mAh Rechargeable lithium battery; Detector: 3.7V, 600mAh Rechargeable lithium battery