Brand new latest 2025 production Digital Clock, Watch Timer w/ built in Beat Amplifier.   The unit operates from 4 X AA Alkaline Batteries (NOT INCLUDED)  or  UL Listed DC Wall Pack (INCLUDED) 120 VAC.   This is a high resolution timing machine that simultaneously measures and displays Rate, Average, Second/Day, Preset Train & Error (Sec/Day).    There is also a "holdoff" control that allows you to reduce noise/error/extra ticks that many users find extremely useful.   Also included is a clip on sensor for clocks.   As an optional, accessory available at an extra cost is a Vise w/Sensor for wrist and pocket watches.    The unit is in stock available for immediate shipping.   2 year no-hassle warranty.  We (Adams Brown Company, Cranbury NJ) are the designer & manufacturer.   Free USPS shipping for USA domestic orders.   Comes with instruction manual & book of clock/watch trains and beat rates.  Thanks for looking.