Vad betyder Keys:43?

Är det nån, som vet vad menas med Keys:43?

- Remote Model: Philips RC2604321/01 
- OS Compatibility: Windows XP, Vista, & 7, Linux 
- Drivers: Windows Plug and Play 
- IR Range: 10 Meters Max 
- IR Code: RC-6 Format 
- Remote Batteries: 2 x CR2032 (Included) 
[B]- Keys: 43 [/B]
- Dimensions: 138 x 47 x 13mm (LxWxH) 
- Weight: 58g Excluding Batteries 
- Module Connections: USB, Power on/off 
- Special Features: Power On from Off state