Roland RT-5S  Snare Trigger Chrome. Includes a printed copy of the manual. Pre owned condition. It has been tested and works. It has some wear on it. Please see photos. . 
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Let Your Acoustic Snare Drum Generate Awesome Electronic Sounds!

If you own an acoustic drum set but want to play electronic sounds, here's a simple solution: Roland's RT-Series Acoustic Drum Triggers. These drum triggers install easily and non-permanently on your acoustic drum set. Once in place, they send a trigger signal to compatible sound modules, giving acoustic drummers access to entirely new sound palettes. The RT-5S Snare Drum Trigger is a compact, affordable way to connect your snare drum to any sound module. Roland RT-5S Snare Drum Trigger at a 
Glance:
Dual-zone trigger with Roland V-Drums technologyWorks with any Roland percussion module or other trigger inputsMix and match with tom and kick triggers
RT-5S Snare Drum Trigger - dual-zone trigger with Roland V-Drums technology The Roland RT-5S Snare Drum Trigger clips easily onto your snare drum hoop and provides two separate sensor zones for head and rim. The compact, sensitive RT-5S is based on the same technology found on the high-end Roland V-Drums to give you superior trigger response with minimal crosstalk. It's perfect for triggering velocity-switched multi-samples! Works with any Roland percussion module or other trigger inputs The RT-5S Snare Trigger can plug directly into any Roland percussion module, including the TD-20, TD-10, TD-8, SPD Series and the HPD-15 HandSonic. Or use the TMC-6 trigger-to-MIDI converter to play other MIDI modules or even record your acoustic playing into a sequencer. The versatile RT-5S trigger can help turn your acoustic kit into a sound laboratory! Mix and match with tom and kick triggers The RT-5S Snare Drum Trigger works great in combination with Roland's tom trigger and the innovative kick sensor, which is designed to fit virtually any kick drum. Used together, Roland RT-Series triggers can add new electronic power to your acoustic drum kit! 
Trigger Features:
High-quality dual-zone drum triggerUses sensor technology from Roland V-DrumsCan be easily installed or removed without damage to acoustic drumsSuperior sensor construction maintains natural acoustic soundRock-solid construction built to withstand aggressive playingIdeal for use with Roland TMC-6 Trigger MIDI ConverterWorks directly with Roland V-Drum modules and SPD-Series pads
Turn your drum kit into a sound factory with the Roland RT-5S Snare Drum Trigger!