JBL Endurance JUMP headphones have your back when it’s time to take your workout leaps and bounds ahead. Guaranteed never to hurt or fall out, these buds let you turn on the energy – instantly. Slip on the Power Hook design and they automatically power on. Move in confidence with a wireless neckband and Twist Lock ear tips. Endure the elements with IPX7 waterproofing and up to 8-hours of battery life. And if that’s not enough, be ready for more in a few minutes thanks to a convenient Speed Charge battery. Features: Bluetooth version: 4.2 Ear tip material: Silicon Driver size (mm): 10.0 Bluetooth profiles: HFP v1.6, A2DP v1.3, AVRCP v1.5 Bluetooth frequency: 2.402GHz-2.48GHz Bluetooth transmitted modulation: GFSK, π/4DQPSK,8DPSK Bluetooth transmitter power: 4 dbm Driver sensitivity at 1kHz/1mW (dB): -20dB Dynamic frequency response range (Hz): 20Hz–20kHz Impedance (ohms): 16.0 Number of drivers per ear: 1.0 Battery Type: Lithium-ion polymer (3.7V, 120mAh) Charging time (hours from empty): 2 Maximum music play time with ANC off (hours): 8.0 Speed Charging time (hours): 2.0 Maximum talk time (hours): 7 Bixby: No Built-in Microphone: Yes Hands Free Call: Yes In-ear: Yes Power hook: Yes Rechargeable battery: Yes Secure Fit: Yes Siri/ Google Now: No Speed charge: Yes Touch Control: Yes Twist lock: Yes Water Proof: Yes Wireless: Yes