Operating frequency
up to 20 MHz
GPIO
18 general purpose I/O pins
Timer/Counter
Multiple 16-bit timer/counters
Operating Voltage Range
2.4V ~ 5.5V
Quality Warranty
45days-60days
Shipment
DHL\FEDEX\UPS\TNT\EPACK\CHINA POST
Payment
Paypal\TT\Western Union\Trade Assurance