The ELK-120 v.2 features 4 channels that can be configured as 2 channels of siren and 2 channels of voice, or all 4 channels can be used for voice. Either way the voice channels are fully recordable and are stored in non-volatile re-programmable memory. Total time of recording is 8 minutes. The Siren channels offer a choice of: Classic Yelp Sound, Temporal Coded Horn, or Pulsing Industrial Horn. • Four Channels Configurable as: Two Siren and Two Recordable Voice OR Four Recordable Voice. • Maximum record time is 8 minutes divided between the number of voice channels. • Siren Sounds: Classic Yelp Siren, Temporal Coded Horn, and Steady Industrial Horn. • Temporal Coded Horn meets ANSI standard for Audible Emergency Evacuation Signaling. • Recordings stored in non-volatile memory. • Voice channels accept momentary triggers. • "One Shot" or Continuous voice playback settings. • Option to trigger +V1 and or +S3 channels from a steady or pulsing input (ComboTrigger™) • Built-in condenser microphone for recording. • Adjustable speaker volume and current draw. • Powerful 24 watt audio amplifier for Speakers. • Line Level Output Jack for Paging Systems and Amplifiers. • PC sound card interface connector. • Lifetime Limited Warranty. • Operating Voltage: • Current Draw: • Sound Level: • Max. Speaker Loading: • Max. Message Length: • Pulsing Input: • Size: 11 to 14 Volts DC. .2 to 2 Amps, (depends on volume setting & speaker load). 120 db @ 1 meter, 14 vdc, with one 8 ohm speaker. 4 Ohms. 2 min. per channel in voice mode or 4 min. per 2 channels in siren mode. 1/2 to 2 Second Pulse, 50% duty cycle. 3" x 5" x 1.25" (76 x 127 x 32mm).