The RFPulse101A is pulse counter and totalizer data recorder with built-in, wireless (RF) transmitter. Using the RFC101A receiver, the RFTemp101A can transmit data up to 120 feet, line of sight. Built-in memory also stores data internally. Can be used with dry contact switches and relays or analog voltage input signals from external devices (i.e. pulse initiators, pulse output transducers, totalizers, counters, flow meters etc.). Features user-programmable Engineering Units and fast data sampling rate. Note: Approved for use in the US and Canada only. RF Carrier Frequency: 418 ±0.075MHz RF Baud Rate: 4,800 Receiver Sensitivity (RFC101A): -90dBm typical Typical outdoors/line of sight: Up to 120' (36m) Typical indoors/urban line of sight: Up to 40' (12m) Maximum Pulse Rate: 100 Hz Minimum Input Active (Low) Time: 4 milliseconds Internal Weak Pull-Up: <500ìA Input Range: 0~12V continuous (0~30V peak) Input Low: <0.4V Input High: >2.7V Input Impedance: >1k Memory: 4,095 Sample Rate: 30 seconds up to 12 hours Battery Life*: 15 minutes up to 5 years Dimensions: 2.7" x 1.6" x 0.8", with 2.0" whip antenna (68mm x 41mm x 20mm, 51mm whip antenna) Material: ABS plastic Approvals: US(FCC), CA(IC) Required Interface Package: RFC101A Weight: 2oz.