The MFJ-434B Contest Voice Keyer Microprocessor-controlled Contest Voice Keyer sends your call sign, does contest exchanges or any other messages in your own natural voice. Records and plays up to five pre-recorded messages up to 75 seconds in total. Uses the latest EEPROM technology which stores the message up to 100 years, and does not require back up batteries. Connected to virtually any make of rig, the 8-pin mic socket can be customised using internal jumpers. All lines are RF filtered to eliminate RFI, feedback and distortion. An isolation transformer totally iliminates hum and distortion casued by ground loops.

Key Features/Specifications:

• Up to 5 voice messages
• 75 seconds total
• Microprocessor controlled
• Latest EEPROM technology
• Messages stored for 100 years
• No battery backup required
• Stand alone or computer controlled
• Repeat messages
• Variable delay
• Receives off-air signal through radio
• All lines filtered
• Audio isolation transsformer
• 8-pin mic. socket 
• Easily customised with jumpers
• Suitable for Kenwood, Icom, Yaesu & Alinco
• Built-in speaker amplifier
• Power 9V PP3 internal or 9-15V DC external (not included) 
• Size 165 x 65 x 165mm