| The difference of each product is a supported communications protocol as the following table. 
							
								
									| product | supported communications protocol |  
									| BHT-BASIC4.0 Transfer Utility | Ymodem protocol BHT-Ir protocol
 |  
									| Ir-Transfer Utility(It3cw32.exe) | BHT-Ir protocol |  
									| Transfer Utility(Tu3w32.exe) | BHT protocol |  |