Product Description This product uses advanced non-contact RF card technology and SMT process, the user water meter one card at the same time management, with measurement accuracy, high precision, security, performance, reliable, feature-rich, low power consumption, simple operation etc., especially suitable for residential communities, water apartments user, office buildings, enterprises and other places, electrical measurement and control. The product meets the GB / T17215.321-2008 and GB / T18460.3-2001 standards. Functions and features 1, LCD (liquid crystal) display, clarity and intuitive. 2, during normal operation cycle of the LCD display remaining power meter serial number and cumulative power consumption and other information. 3, power failure alarm function: When the remaining capacity reaches the alarm value (setting) the meter automatically shut off to remind users to purchase, users can continue to power the card until the remaining battery power meter to zero again. 4, load control function: When the power load exceeds a set value, the meter automatically power off, reducing the load for about 5 minutes after the meter automatically restore power. 5, using high-power magnetic latching relay, wide range, strong overload capacity, long-term work overload without damage. 6, the card features: electric and water meters can share a radio frequency card and a management system, a user can simultaneously control two card meter, three meter. The main technical parameters Rated voltage: 220V Rated current: 5 (20) A 5 (40) A 10 (40) A 15 (60) A 20 (80) A Accuracy: 1 2 Pulse constant: 3200imp / kw? h Rated frequency: 50Hz Working temperature: -25 ℃ - + 55 ℃ Dimensions: 173mm × 115mm × 67mm