Product Parameters Item No. DL-E025B Color Black+Yellow/Blue/Purple/Beige Bluetooth Version 5.3 Support Protocol HFP, A2DP, AVRCP Transmission Range ≥10meters Working Frequency 2.4G Hz Frequency Range 20Hz~20KHz Speaker Impedance 32Ω±15% Charging Case Capacity 350mAh Charging Case Standard DC 5V1A Earbuds built-in Battery 35mAh Charging Voltage DC 5V±0.2V Talk Time ≥3.5Hrs Music Play Time ≥5Hrs Earbuds Charging Time ≈1.5Hrs Case Charing Time ≈2Hrs Charging Case Size 63*50*29.5mm Earbud (per) Size 33*23*23mm Weight (set) 42.8g Earbud (per) Weight 4.2g Product Description DNS Noise Reduction and Powerful Sound: The advanced AI algorithm technology optimize the call signal in real time, minimize noise interference, and ensure that the call content is distinguishable. Energy-Efficient Bluetooth: Wireless earphones boast high energy efficiency Bluetooth technology, and the cumulative battery life is up to 20h. Ergonomic Design: Comfortable to wear, regardless of long-term use or strenuous exercise, earphones' adaptability and stability keep users fully immersed in music without distraction. Touch Control and Voice Assistant: The bluetooth earphones boast binaural touch interaction, and you can make calls, switch songs, and adjust the volume by touching the Bluetooth wireless earbuds. Charging Indicator and Instant Connection: When the earbuds is in the bin, the charging slot indicator flashes once, indicating that the earphone is in the charging state, ensuring seamless performance and greater stability. Detailed Photos WHAT'S IN THE BOX INSTRUCTIONS FUNCTION OPERATIONS ATTENTIONS Company Profile As a leading Bluetooth headphones manufacturer integrating production, manufacturing, sales, and after-sales service, we offer a comprehensive range of mid-to-high-end Bluetooth headphones and other audio accessories. With our commitment to quality and innovation, we have achieved international certifications such as CE, FCC, RoHS, BQB, etc., affirming our position as a trusted manufacturer. We are customer-centered, committed to providing customers with an unparalleled user experience and implementing a product strategy that combines the latest technology applications with fashion design to meet the needs of consumers and enterprise clients in an all-around way. We are actively expanding the market all over the world, offering OEM and ODM services to a diverse customer base, aiming to gain widespread recognition and trust of products with independent laboratories, advanced testing equipment, excellent product quality, and reasonable prices. We will be committed to combining market demands with new technologies and new processes, and elevate end customers to experience a wonderful scientific and technological life by producing products with higher quality, better performance, and more exquisite appearance.