The ELK-120 v.3 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. The siren sounds can be triggered in sequence with the voice-Channels. The-Channels can be configured to play once or to repeat endlessly. Two-Channels support our unique ComboTrigger™ feature, especially designed for controls that have a single alarm output with a pulsing option for fire or burglary. When pulsed, the Temporal Coded Horn fire signal is sounded. The optional ELK-129 Computer Interface may be used to download .WAV sounds from a PC to the ELK-120. Also available is the ELK-124 offering eight recordable voice-Channels of 1 minute each.