The K&K Trinity requires a blending preamp that provides power to the mic. There are several preamps available and, I believe, they are all more expensive than the K&K (LR Baggs makes one that may be about the same price). Battery life is t a big deal, just change batteries every 6 months or so during a string change.
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"We got both kinds of music, we got country and western" ~ from The Blues Brothers
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