·Bluetooth Specifications: Version 5.4, supporting protocols including A2DP, AVCTP, AVDTP, AVRCP, HFP, SPP, SMP, ATT, GAP, GATT, RECOMM, SDP, and I2CAP. ·Wireless Performance: Operating distance of ≥10m; Class 2 transmission power; working on the 2.402 - 2.480 GHz frequency range. ·Audio Hardware: Equipped with a 40mm speaker with 32Ω impedance. ·Expansion & Radio: Supports TF cards with a capacity range of 128M - 32G; FM radio function covering 87.5 - 108 MHz. ·Battery & Endurance: Powered by a 200 mAh polymer lithium-ion battery, offering 5 hours of music playback and 6 hours of talk time; full charge takes 1.5 hours.