Jabra Elite 4 Wireless Earbuds | Active Noise Cancelling | Comfortable Bluetooth Earphones (BRAND NEW/SEALED) REFURBISHED Optical heart sensor

Optical heart sensor

1 Display Type ‎LCD Resolution ‎HD Batteries Included ‎Yes Batteries Required ‎Yes Battery Cell Composition ‎Lithium Polymer Battery Power Rating ‎5000 Milliampere Hour (mAh) Cellular Technology ‎4G Connector Type ‎Cellular

A new side door makes changing batteries even faster

TruSleep Monitor & Stress Monitor

Jabra Elite 4 Wireless Earbuds | Active Noise Cancelling | Comfortable Bluetooth Earphones (BRAND NEW/SEALED) REFURBISHED Optical heart sensorFeatures Superior connectivity: Instantly connect to your Android phone with Fast Pair or your PC with Swift Pair (OS 6. 0 or higher). Seamlessly switch between 2 devices with Bluetooth Multipoint Optimal sound: Active Noise Cancelling (ANC) technology blocks background noise or switch to HearThrough to hear your surroundings. Four microphones ensure crystal clear calls anywhere Maximum performance: Use only one bud in Mono Mode. Each bud provides up