CJSM2 Rnet wheelchair controller 

All of the main wheelchair controller manufacturers have Bluetooth mouse options, including Dynamics Controls with their Linx controller, Curtis instrument’s quantum q-logic controller, and Curtiss-Wright - Rnet controls.
For example for chairs with R-net controls you can replace the old joystick with a CJSM2 -BT as seen in the picture here. This R-net Joystick Module has Infra-Red (IR) capabilities included. IR technology is widely used to remotely control household devices such as TVs, DVD players, and multi-media systems, as well as some home-automation equipment. Individual IR commands can be learned from an appliance’s remote handset and stored in the CJSM2. Also Integrated Bluetooth technology is an option, to enable control of computers, Android tablets, iPads, iPhones and other smart devices from a powered wheelchair. To switch between the devices, the user simply navigates the menu and selects the device they wish to control. The R-net’s CJSM2 can easily replace the existing rnet joystick module, with no system re-configuration or programming required.