1. ATS chipset 2. Bluetooth transmitter supports one drag and two 3. Bluetooth audio compatibility is strong, the signal is stable 4. Double 3.5mm Aviation plug stereo audio input and output compatibility, 5.Type C audio input Bluetooth chip group: ATS2851 Bluetooth version: 5.3 Support code: Support protocol: HFP, , A2DP, AVRCP SPP and Power consumption: 12-18MA Twist : (1kHz) 1 % Frequency response: 20 - 20kHz Operation button: Audio output/input can be a three-dimensional sound, single-sound, the latest C-USB interface: antenna-type ceramics Connection distance: 10merter Multi -link supports two pairs of headphones/ connected simultaneously Battery capacity: 3.7V 250mAh Postering time 14 - 15H Charging time 1.5h Colour:Black Material:ABS Package Contents: 1 x Aircraft audio adapter 1 x Charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.