Quickly check your motor temperature. Small enough to fit in your pocket. Readins in Fahrenheit(-27 to 230) or Celsius(-33 to 110). Instatn readins, response times under one second. Includes real-time clock and stopwatch. Includes lithium battery with 40 hour battery life. Availability: Usually ships in 2-3 business days. SSH-939$17.99 July Special! Take $3 off any order over $50 which includes a Black Hawk Model with code word BHM. Every order over $25 will recieve one FREE package of Control Line Connectors.