There are a few common chips between the controller and the headset, as well as a few new ones:

NXP Semiconductors LPC11U37F 32-Bit ARM Cortex-M0 Microcontroller

Lattice Semiconductor ICE40HX8K-CB132 Ultra-low Power FPGA

Invensense MPU-6500 6-axis Gyroscope and Accelerometer Combo

Micron M25P40 4 Mb Serial Flash Memory

Texas Instruments (formerly National Semiconductor) LP38798SD 800 mA Linear Voltage Regulator

Texas Instruments BQ24158 Battery Charger IC

ON Semiconductor FSA3000 2-Port USB 2.0 Switch