Roland KD-7 – Dynamics-sensitive Kick Drum Trigger 

This dynamics-sensitive kick drum trigger can be used with a standard kick drum pedal. It features a mix input for chaining two KD-7's for double-bass setup, and comes with a Beater and connection cable (kick drum pedal not included). The KD-7 is the ideal kick trigger for use with the HPD-15 and RMP-1.