2-Speed Ticker Tape Timer with 12V Power Supply

This 2-speed ticker tape timer includes a 12V power supply with a 110V wall plug adapter, eliminating the need for a separate power source. The timer operates at a selectable rate of 25 or 40 dots per second, allowing students to visualize distance, velocity, and acceleration versus time. A vibrating striker prints dots on tape using carbon discs. The unit is housed in a durable, scratch-proof plastic case with a unique adjustable carbon disc mechanism. Includes a 50m roll of tape and 100 carbon discs. Operates on 12 volts DC (adapter included).