This is the MCU-W2 Wireless Joystick Kit #A-5734-0200.

The wireless manual control unit (MCU W-2) is a comprehensive joystick designed for use with Renishaw’s range of UCC controllers

Based on the MCU5-2 joystick design, the MCU W-2 uses modern battery technology and Bluetooth® radio modules to provide an effective wireless joystick with a maximum of 25 m range and over eight hours between battery changes.

A spare battery and an automatic charger are included in the joystick docking cradle.