HarpLock is mounted between the grill and the base of a microphone and works best with a stable mic stand like the DR Pro Tripod Mic Stand with Telescoping Boom. Traditional circular-based mic stands and lightweight tripod's are prone to movement and are not recommended.
HarpLock places the harmonica close enough to the mic to capture the sound of the harmonica, and directs air from the harp at an angle that prevent plosives. (A loud rush of air at the capsule of the microphone.)
$29.95 Plus Shipping.