Wireless thermostats can save a significant amount of time during installation by not having to run wires.  There are many different kinds of wireless thermostats that will fit your application.

Wireless Fan Coil Thermostat

The Wave Wireless system is a programmable fan coil wireless thermostat.  This thermostat controls PTAC, PTHP, & fan coil applications. Functionality includes; 1 Heat/ 1 Cool output, 3-speed fan and manual or auto changeover. 

Wireless Heat Pump Thermostat

K2500 WavePRO is a wireless heat pump thermostat transmitter & receiver system engineered to control conventional (gas, oil, electric) or heat-pump systems. It supports auxiliary heat stages and the latest compressor technology. Extensive programming modes enable ultimate operating performance.