1, "Micro Cooling Fan" is necessary to be accompanied by a certificate, manual, electric fan nameplate should produce the make, model standards, the extra power, extra voltage, power and frequency varieties and other policies;
2, "Micro Cooling Fan" of outer and inner packaging without damage;
3, check the electric fan shook his head, whether the switch is the first time the governor and the captain of the panel symbol;
4, test run, the power, with a test pencil checking metal parts, whether there is leakage representation;
5, at the time of purchase inspection association "Micro Cooling Fan" of 3C symbol or check statements.