This is the SRAM Red XPLR AXS Threadmount Power Meter Spider Crankset.

Features:

• Thread mount design is light, stiff and accurate, and available in 38T-46T
• User replaceable CR2032 battery with 200-hour battery life
• Bluetooth low energy technology and ANT+ wireless data transfer
• MagicZero automatically checks and recalibrates your power meter as you ride
• No cadence magnet required
• AXS™ enabled for easy monitoring and firmware upgrades
• SRAM Model ID: PM-AXS-SPDR-E1

Product Specifications:

• Speeds    n/a
• Crank arm length    n/a
• BB Compatibility    n/a
• Chainring Size    n/a
• Bolt Circle Diameter (BCD)    Thread Mount
• Chainline    n/a
• BB Spindle Interface    DUB
• Chainring material    n/a
• Power Meter Type    Ant USB
• Hub Spacing Compatibility    n/a
• Chainring Offset    n/a
• Vendor Item No. 00.3018.388.000