The attached PDF document explains the proper intallation of the additional spring required for the Welch Allyn 71000-A handle.
WiscMed supports the use of the Welch Allyn 71000-A handle with a minor modification. We have found that an additional battery spring is necessary to prevent a bump on the handle from resetting the Wispr.
Please contact WiscMed and we will send you the required spring at no charge. Installing the spring requires no tools and takes less than 30 seconds.