Driver size: 10 mm / 0.39" Dynamic Driver Earbuds resistance factor: IP54 Power supply: 5V 1A Frequency response: 20 Hz - 20 kHz Maximum operation temperature: 45 ‹C Impedance: 16 ohm Sensitivity: 100 dB SPL@1 kHz Maximum SPL: 95 dB Microphone sensitivity: -38 dBV/Pa@1 kHz Dimensions Earbud: 5.2 g per pc (10.4 g combined) /0.0115 lbs per pc (0.0229 lbs combined) Charging case: 42 g / 0.0926 lbs Earbud dimensions (l x w x d): 33.4*22.6*25 mm Charging case dimensions (l x w x d): 61.5*29.15*47 mm Control and Connection Bluetooth version: 5.3 Bluetooth profile version: A2DP V1.4, AVRCP V1.6.2, HFP V1.8 Bluetooth transmitter frequency range: 2.4 GHz - 2.4835 GHz Bluetooth transmitter power: ≤13 dBm (EIRP) Bluetooth transmitter modulation: GFSK, π/4-DQPSK, 8DPSK Battery Earbud battery type: Lithium-ion battery (65 mAh / 3.85 V) Charging case battery type: Lithium-ion battery (590 mAh / 3.8 V) Charging time: 2 hrs from empty Music playtime with BT on and ANC off: Up to 12 hrs Music playtime with BT on and ANC on: Up to 10 hrs Talk time with ANC off: Up to 6 hrs Talk time with ANC on: Up to 5 hrs Take on your day one song at a time with JBL Tune Beam 2 true wireless earbuds featuring Adaptive Noise Cancelling. They deliver up to 48 hours of exceptional JBL Pure Bass Sound and JBL Spatial Sound, while the ergonomic (and water and dust resistant) design gives you all-day comfort in any weather. Enjoy perfect-sounding calls without ambient noise, all managed using intuitive touch controls. With Adaptive Noise Cancelling and Smart Ambient technology, you can tune out the world, or choose how much you engage with your surroundings. You can even personalize your sound experience with the JBL Headphones app and tailor audio around you with Personi-Fi 3.0. Pop in the JBL Tune Beam 2 and experience your world your way. 12 Months Local Manufacturer Warranty Store in a cool dry place. China