JBL JBLENDURACEBLKAM-Z Endurance Race Waterproof Wireless Sport Earbuds Black - Certified Refurbished DescriptionDesigned for those with an active lifestyle, the JBL Endurance Race TWS True Wireless In-Ear Sport Headphones feature a water and dustproof design that makes them ideal for working out or hanging out at the beach. They can even handle being submerged in up to 3.3' of water. With an ergonomic wing enhancer and Twistlock technology, the earbuds alleviate pressure point discomfort, while providing a secure fit during vigorous workouts. Throughout the rest of your day, you can enjoy your favorite podcasts and albums while still being able to stay connected with others. Activate Ambient Aware to better hear your surroundings, or use TalkThru to have a quick conversation with someone nearby, all without having to remove the Endurance Race earbuds. For those farther away, use the dual beamforming mics to make clear hands-free calls. All of this and more is possible all day long with up to 30 hours of total battery life with the included charging case. Features6mm Drivers with JBL Pure Bass SoundUp to 10 Hours of PlaybackIP67-Rated Water & DustproofCharging Case with 20 Additional Hours All-Day Battery Life You get up to 10 hours of battery life on a full charge, with another 20 hours available within the included charging case. Speed Charge Forgot to recharge and low on power? A quick 10 minutes in the charging case will give you up to 1 hour of playtime. JBL Headphones App JBL's dedicated Headphones app lets you set your preferred voice assistance, adjust settings, change EQ levels, and more. Additional Features 6mm dynamic drivers with JBL Pure Bass sound Integrated controls Interact with your mobile device's voice assistant. Specifications Headphone Earpiece Design In-Ear (Intra-Aural) Driver Type Dynamic Driver Size 0.2" / 6 mm Impedance 16 Ohms Active Noise Cancellation No Controls/Microphone Location Controls: Earpiece (Side Unspecified) Microphone: Earpiece (Side Unspecified) Full Remote OS Support Not Specified by Manufacturer Performance Frequency Response 20 Hz to 20 kHz (Wireless) Sensitivity 97 dB SPL at 1 kHz Maximum Sound Pressure Level (SPL) 92 dB Microphone Number of Mics 2 Beamforming Support Yes Noise Canceling Not Specified by Manufacturer Sensitivity -38 dBV/Pa at 1 kHz Impedance 16 Ohms Wireless Connectivity Wireless Modulation π/4 DQPSK, 8DPSK, GFSK Bluetooth Profiles A2DP 1.3, AVRCP 1.6, HFP 1.7 Bluetooth 5.2 Frequency Bluetooth: 2.4 GHz (2.4 to 2.4835 GHz) Bluetooth Transmitter Power 13 dBm Battery Battery Chemistry Lithium-Ion Capacity (mAh) 70 mAh Runtime 10 Hours (BT) Quick Charging Times 10 Minutes for 1 Hour Recharge Time 2 Hours DC Input Power 5 VDC at 1 A Wireless Charging None Charging Port Pins Charging Case Additional Runtime 20 Hours (BT) Battery Chemistry Lithium-Ion Capacity 550 mAh Charging Interface USB Type-C Environmental Operating Temperature 113°F / 45°C Physical Color Black Water Resistance Submersible IP Rating IP67 Weight Headphones: 0.2 oz / 6.2 g (Each) Charging Case: 1.6 oz / 44.9 g Packaging Info Package Weight 0.345 lb Box Dimensions (LxWxH) 6.2 x 4.1 x 1.7" Frequently Asked Questions How much is shipping? Everything in our store is free standard shipping with the continental US When will you ship? Most orders will ship by the following business day. Once shipped you will be sent a tracking number so you track your order. Can I return something I purchased? Yes, we offer 30 day returns on all products purchased through our store. What payment method do you accept? We accept all major credit cards and PayPal.