Updated to Matel Cups, The Latest Max model that made by Tigerbuilder, a lots of improvement compared with Blueturm Max v1.0, improved sound quality, ANC, Transparency mode, Battery life, and very good microphone. Chipset: Airoha 1561M; Manufeacture: Tigerbuilder; OTA: yes; ANC: yes; Transparency mode: Yes; Quick Switch between 2 Devices: No; Audio Share: Yes; In ear detection: Yes; Name change: Yes; Battery life: About 50 Hours; Bluetooth Version: 5.3.