The Shure RMCE-TW2-Left is a left-side replacement adapter for the Shure RMCE-TW2 True Wireless earphone adapter set (sold separately). This replacement unit ensures seamless wireless audio experience with supported codecs like Qualcomm aptX, SBC, and AAC. It operates within a frequency range of 2402 to 2480 MHz and offers a working range of 10 meters. The adapter is designed for durability and high-performance, with an integral antenna providing reliable signal strength. Product Specification: Color: Black Frequency: 2402 to 2480 MHz. Modulation Type: GFSK, π/4DQPSK, 8DPSK. Antenna Gain: -2.73 dBi (Right). Operating Temperature: 0°C to 45°C (32°F to 113°F). Charging Temperature: 0°C to 45°C (32°F to 113°F). Storage Temperature: -10°C to 35°C (14°F to 95°F). Shipping Weight: 0.2 lbs. Shipping Dimensions: 4 x 2 x 2 inches