Technical parameters: 

1.14 Digital input / output ports RX， TX D13， D2 ~~ of， 
2 or 8 analog input port A0 to A7 
3. The TTL level serial transceiver port RX / TX 
4.6 PWM ports， D3，， D5 ， D6， D9， D10， D11 
5. Using Atmel Atmega168P microcontroller 
6.supports serial download 
7. Support for external 5v~ 12V DC power supply 
8. Support 9V battery-powered 
9 clock frequency 16MHz 
10. Dimensions: 33.3 * 18.0 (mm)

1):Logistics:Check your parcel in http://www.yw56.com.cn/english/index.aspx

2):Time:If your parcel don\'t arrive within 60 days(Russian Federation 90 days， Brazil 120 days) we offer full refund ，please don\'t open dispute before contacting us .