Penny + Giles PP1 (or PP1B) handheld programmer used for power wheelchairs. 

• Function: It is designed to adjust wheelchair parameters such as speed, acceleration, and braking to suit individual users. 
• Diagnostics: The tool includes diagnostic utilities, allowing the reading of trip codes and viewing the control system's diagnostic log and timer. 
• Compatibility: It is compatible with specific wheelchair drive systems, often utilized with Pride, Quantum, or Permobil chairs.