B series features:
• 5-30VDC operation with reverse polarity and spike protection
• External, simple hand focusing mechanism
• IP67 rated, fully waterproof
• Thread mounted for simple and versatile mounting
• LED laser operation indicator
• Output power up to 200mW

A
S series include the features of the B series, as well as:
• 9-30VDC operation with reverse polarity and spike protection
• LED pre-failure warning indicator
• Analogue power adjustment in 23 steps
• Simultaneous analogue and TTL modulation up to 1KHz

H series include the features of the S series, as well as:
• 5-30VDC operation with reverse polarity and spike protection
• Logging of temperature, operation hours and other data
• Built-in micro controller and serial interface
• Simultaneous analogue and TTL modulation up to 20MHz
• APC mode with current limit or constant current
• Output power up to 200mW