Suunto's dive computer Stinger. This is a stainless model. Battery is new.

You can find the English manual on Google.

Thank you for looking and feel free to ask any question! 

For more about Stinger's function, please see this page. 

http://www.dive-computer-wizard.com/products-suunto_stinger.html

I am listing other scuba diving goods like dive computers and regulators. Please check!