The newest Hearmath sensor and app! Access a healthy and high-performance state called heart coherence, where your heart and brain are in sync — this helps you prevent or reduce stress, anxiety, and overwhelm, improve health and performance, and clear your thinking for more effective choices.Use real-time heart rhythm coherence biofeedback and evidence-based techniques to live a healthier, happier life. SpecificationsBLUETOOTH COMPATIBILITY*Requires Bluetooth 4.0 or higherANDROIDThis product is designed for use with Android v9.0 and above.IOSRequires iOS 16.0 or above; works with iPhone 6s and iPad OS 15 generation and newer.*Inner Balance Bluetooth uses BT4.0 (BLE–Bluetooth Low Energy), which works at an output power range of 0.5 milliwatts (mW) or less — this is significantly lower than mobile phones, which typically have output levels between 250 mW and 2000 mW. The tiny Bluetooth emitter is in the module that attaches to your garment, not in the ear sensor. Inner Balance Bluetooth is compliant with applicable FCC tests.PACKAGINGBox size: 6.5 x 3.6 x 2.03 inches (16.5 x 8.4 x 5.2 cm)Weight: 6.9 oz (195.6 g)SENSOR WEIGHTPod: 1.1 ozEar: .4 ozTotal: 1.5 ozSENSOR SPECIFICATIONSEar Clip size without Cable: 1.25 inches (3.2 cm)Ear Clip size with Cable: 19.5 inches (49.5 cm)Pod size: 2.75 x .75 x 1.125 inches (7 x 1.9 x 2.9 cm)USB-C Cable length: 4 feet (122 cm)What's in the Box?» Sensor Pod» Ear Clip» Ear Cable» USB-C Charging/Connector Cable» Quick Start Guide