The Moxy 3-Sensor Bundle is intended for training centers that are using Moxy for assessments and for researchers that want to monitor a multiple sites. It can be used to monitor SmO2 and THb on a single superficial muscle anywhere on the body.This bundle includes: Three Moxy Sensors with Light Shields Three Wireless Charger with a 5 Port USB Power Supply Six packs of Light Shield Adhesive Attachments Six packs of Small Adhesive Attachments A 3-Sensor Storage Case Sensor Specifications Measurement SmO2 (Muscle Oxygen Saturation) and THb (Total Hemoglobin) in the capillaries and tissue of muscle. Depth Measures through up to 0.6” (15mm) of skin and fat. Update Rate 0.5 Hz to 2 Hz Smoothing 10 seconds or None. Physical Size (with Light Shield) 5.0 x 4.5 x 1.2 in (128 x 115 x 30 mm) Physical Size (without Light Shield) 2.4 x 2.0 x 0.6 in (62 x 52 x 15 mm) Weight (with Light Shield) 2.1 oz (59 g) Weight (without Light Shield 1.2 oz (48 g) Battery Life 4 hours Standard (7 hours Low Power Mode) Wireless Data Transmission ANT+ MO2 Profile and BLE Data Storage 10,000 data points stored on sensor – Downloaded via web app. Over 5 hours in default update rate Environment 40°F (15°C) to 95°F (35°C) ambient conditions, Water and Sweat Resistant.