Specification: Origin: Mainland China Material: ABS Color: Black, White (Optional) Bluetooth-Compatible Chip: Blue 5656T2 Bluetooth-Compatible Protocol: HFP,HSP,A2DP,AVRCP Bluetooth-Compatible Version: Bluetooth-Compatible V5.2 Frequency Range: 2.402ghz-2.480ghz Transmission Distance (Barrier-Free) : 10 Meters ≥ Channel System: True Stereo Horn Impedance: 16Ω/ Diameter 6mm Speaker Output Power (Max) : 5mw Earphone Sensitivity: 106db Frequency Range: 50hz-20khz Distortion Degree: < 1% Snr: ≥90db Battery Display: Supported Talk Time: 5h Playback Time: 5h Standby Time: 120h Normal Power Operating Range: 3.3v≤Bat≤4.2v Low Battery Warning Range: 3.0v≤Bat < 3.3v Low Power Off: Bat≤3.0v Headphone Battery Capacity: 40mah Polymer Battery For Each Headphone Charging Case Battery Capacity: 300mah Polymer Battery Bluetooth-Compatible Headset Weight: 11g Charging Compartment Size: 80*60*31mm/3.15*2.36*1.22inch Packing Size: 163*105*35mm/6.36*4.1*1.37inch Gross Weight: 94g Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 2Pcs*Headphones 1*Charging Compartment 1*Charging Cable 1*Instruction Manual 1.Advanced Bluetooth-Compatible 5.3: Equipped with the latest Bluetooth-Compatible 5.3 technology, our bluetooth-compatible 5.3 headphones deliver an unparalleled audio experience with faster transmission, stronger connection stability, and an extended range, ensuring seamless music and calls without distortion or lag. 2.Extended Battery Life: Enjoy up to 4-5 hours of uninterrupted listening on a single charge with these wireless earbuds. The charging case provides a digital display for precise battery level indication from 1% to 100%, including clear visibility for each earbud's remaining power. 3.Ergonomic Fit: Designed to mirror the natural contours of the ear, these true stereo headphones feature an arc-shaped structure that aligns with your ear canal for a secure and comfortable fit, ensuring they stay in place during rigorous activities such as running or exercising. 4.Touch Control Sensors: Our hifi headphones boast high-sensitivity touch sensors for touch control capabilities, allowing you to effortlessly manage functions like answering/rejecting calls, adjusting volume (a feature many earbuds lack), switching tracks, and activating voice assistants, promoting hands-free convenience while engaging in sports, driving, or jogging. 5.Universal Compatibility: These in-ear earbuds are designed to work seamlessly with all Bluetooth-Compatible devices, including smartphones, Bluetooth-Compatible PDAs, and other voice devices, ensuring a versatile and hassle-free pairing experience for all users.