TWS headset “EQ4 Graceful” air conduction

The Bluetooth version is 5.3, and the chip used is the JL AC6973D4. It supports several protocols, including Headset, Hands-free, A2DP, and AVRCP. The transmission distance is 10 meters, with a frequency of 2.4 Hz. The speaker unit measures 14 mm, and the impedance is 32Ω ± 15%. It has a frequency response range of 20 to 20,000 Hz and a sensitivity of 98 dB ± 3 dB. The battery capacity includes a 500 mAh charging case and a 110 mAh headset. The charging case input is DC 5V with a Type-C connection, and the charging time is approximately 2 hours for the case and 1.5 hours for the headset. The talk and music time is about 12 hours at 80% volume, while the standby time lasts for 300 hours. It features air conduction technology with a hanging-on-ear design that allows for an open ear experience. The headset supports leader-follower switching, voice assistant activation, song switching, and play/pause functions. It automatically turns on when taken out of the charging case and pairs automatically, then turns off when placed back in the case. The dimensions are 98 × 66.5 × 30 mm, and the total weight is 87 grams, with each earbud weighing 10 grams.