Bt chip ATS2851 Bt version 5.3 Support encoding SBC, AAC, mSBC Support protocols HFP, HSP, A2DP, AVRCP Power consumption 12-18mA Distortion THD (1KHz) ≤ 1% Frequency response 2020KHz Operation mode (touch, button) button Audio input Ф 3.5mm plug stereo, mono Bt wireless one to two connection support Antenna type (FPC, ceramic) ceramic Connection distance ≥ 10 meters Battery capacity 3.7V 200mAh Playback time (dual playback) 9-10h Charging time ≤ 1 hour Main material (shell) ABS Weight (g) approximately 14.3g Size (mm) 57 * 45 * 12 Packaging includes 1 * Bt receiver