Texas Instruments TI Calculator base lab 2 system provides an easy way to collect real-world data and is ideal for middle school math science physics chemistry biology and high school math. Texas Instruments TI Calculator base lab 2 system features 3 collection modes - realtime/non-realtime/fast mode and collects data up to 50 000 samples per sec. System has 3 buttons - transfer/quick setup/start-stop and 3 LEDs to indicate status. • Accessory type: Calculator base lab 2 system. • Three analog channels for data collection. • One channel for an ultrasonic motion detector and digital input and output. • CBL DIN adaptor support for use with all other compatible sensors (sold separately). • Sold as 1 Each.