ITEM NAME:1 Piece XD-58C Pulsesensor Heart-Rate Sensor Module Pulse Sensor For Ardui JJP Descriptio n Specifications: Length: 18mm Width: 18mm Height: 4mm Minimum Operating Temperature: -40 Â °C Maximum Working Temperature: 85 Â °C Pin Speed: 2.54 Mm Cable Length: 20cm Package Included: 1 * Heart Rate Sensor Module We offer you what you need! 1 Piece XD-58C Pulsesensor Heart-Rate Sensor Module Pulse Sensor For Arduino.1 Heart Rate Sensor Module. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted. Pin Speed: 2.54 Mm. We'd like to settle any problem in a friendly manner.