Steelman 97202-05 Replacement Wireless ChassisEAR Transmitter #4 REPLACEMENT UNIT - This is a replacement for the channel #4 wireless transmitter for the 97202 Wireless ChassisEAR DETECT SQUEAKS AND RATTLES - Wireless ChassisEAR detects squeaks and rattles throughout a car or truck's chassis 50-FOOT RANGE - Noises can be transmitted up to 50-feet from the transmitter to the receiver allowing use on small and large vehicles INDICATOR LED - LED Indicator light to show when unit is actively transmitting MULTIPLE ATTACHMENT METHODS - Transmitter comes with 2 built in attachment options, a spring-clip and two integrated magnets BATTERY OPERATED - Powered by 4 AAA batteries (not included)