【True Bone Conduction Technology】Experience superior audio quality with the 13mm bone conduction transducer, delivering clear sound without blocking your ears. 【IP68 Waterproof Rating】Enjoy worry-free use during swimming and intense workouts with the highest level of water and dust protection. 【Comfortable Design】The lightweight silicone and titanium alloy construction with memory steel wire ensures a secure and comfortable fit for extended wear. 【Built-in 32GB Storage】Store your favorite tracks directly on the device, allowing you to listen without a connected phone. 【Advanced Bluetooth-compatible 5.4】Benefit from improved connectivity, lower power consumption, and enhanced audio quality with the latest Bluetooth-compatible technology. Specifications: Chip and model: JL7006 Bluetooth-compatible version: 5.4 Battery capacity: 140mAh Play time: 8H@70% volume Talk time: 6H@70% volume Standby time: 240 Charging time: 2-3 hours Product size: 13.2cm X 10.6cmX4.3cm Net weight: 24g Wireless working range: 10 meters Speaker sensitivity: 86 ±3dB Supported protocols: A2DP 1.3, HFP 1.7, AVRCP 1.6 Speaker frequency: 180hz-16000Hz Input current/voltage: 5V/100mA Material: Silicone + ABS + titanium alloy memory steel wire Microphone sensitivity: -38dBV/Pa 94dB SPL@1kHz Microphone signal-to-noise ratio: 38dB SPL Microphone distortion THD: less than 0.1% 94 dB SPL @ 1kHz Microphone impedance: 400 Ω Speaker type: 13mm vibrator Speaker impedance: 8Ω Frequency response: 20HZ-20KHZ Rated power: 500mW