Green Lion River True Wireless Earbuds provide quality sound and comfort. Made of ABS + PC material, it has a light but long-lasting everyday wear structure. With a 13mm speaker size, it gives deep sound, a frequency of 20Hz-20kHz, and a 32Ω impedance that ensures crystal clear and dynamic sound. The sensitivity of 116±3dB provides depth to your music. With Bluetooth V5.4, these earbuds offer a stable connection within a 10-15m transmission range. Enjoy 6-7 hours of playtime and up to 35 hours standby with the 400mAh case battery and 40mAh earbuds battery. Fast and convenient Type-C charging offers quick recharges in 1.5 hours. Wireless charging is also available for added convenience. Equipped with ANC and ENC clarity technology and noise cancellation of -42dB, you've crystal-clear sound even in the noisiest environments. IPX4 waterproofing protection makes them perfect for outdoor use, and smart in-ear detection delivers peak battery efficiency.