JBL JBLENDURPEAKIIBKAM-Z Endurance PEAK II True Wireless In-Ear Sport Headphones Black - Certified Refurbished Description Get that extra boost with JBL's Pure Bass sound and workout as hard as you want with the Endurance PEAK II True Wireless In-Ear Sport Headphones from JBL. These in-ear headphones feature IPX7-rated moisture resistance, making them sweat and rainproof, and with the Powerhook ergonomic design, they will stay secure and comfortable. Rather than support a general ear type, Powerhook conforms to your ear shape with bendable wire on the ear hook. When in place, you can enjoy audio for up to 6 hours on a full charge, with up to 24 additional hours available within the included charging case. Simply place the earbuds inside and close the case to begin recharging them. Thanks to JBL's Dual Connect technology, removing just one earbud from the case gives you access to multiple features. You can quickly take a call, adjust volume, or access your mobile device's digital assistant. Features Up to 6 Hours of Playback Up to 24 More with Charging Case Powerhook Bendable Ear Hooks IPX7 Sweat Rainproof JBL Pure Bass Sound Get enough bass to give your whole body a boost and get that extra push right when you need it the most. Up to 30 Hours of Playback (6 Hours in Buds/24 hours in Case) With a battery that lasts as long as you can, you've got the extra inspiration it takes to make you go that extra mile. Powerhook Design for Ergonomic Fit and easy control The Endurance PEAK II adjusts to you, not the other way around. The bendable wire on the ear hook lets you adjust the headphone to your size and comfort level. Also, you can stay focused on the task at hand with music that starts and stops when you do and controls intuitive enough to almost read your mind make it easy to stay in the groove. Specifications Headphone Earpiece Design In-Ear (Intra-Aural) Driver Size 0.4" / 10mm Impedance 16 Ohms Active Noise Cancellation No Controls/Microphone Location Controls: Left Earpiece, Right Earpiece Microphone: Left Earpiece, Right Earpiece Full Remote OS Support Not Specified by Manufacturer Performance Frequency Response 20 Hz to 20 kHz (Wireless) Sensitivity 95 dB SPL at 1 kHz Maximum Sound Pressure Level (SPL) 93 dB Microphone Sensitivity -38 dBV/Pa at 1 kHz Wireless Connectivity Wireless Modulation Bluetooth:/4 DQPSK, 8DPSK, GFSK Bluetooth Profiles A2DP 1.3, AVRCP 1.5, HFP 1.7 Bluetooth 5.0 Frequency Bluetooth:2.4 GHz (2.4 to 2.4835 GHz) Transmitter Power 10 dBm Battery Battery Chemistry Lithium-Ion Capacity (mAh) 60 mAh Runtime 6 Hours (BT) Recharge Time 2 Hours DC Input Power 5 VDC at 1 A Charging Port Pins Charging Case Additional Runtime 24 Hours Battery Chemistry Lithium-Ion Capacity 770 mAh Charging Interface USB Type-C Physical Water Resistance Resistant Weight Headphones 0.5oz / 13g (Each) Charging Case 2.7oz / 77g Packaging Info Package Weight 0.69 lb Box Dimensions (LxWxH) 6.55 x 4.15 x 2.15"