< 60g Ultra-Lightweight Design The small, portable design makes it an ideal travel companion for gaming, while its compact shape allows for easy handling and control (battery weight not included) 2 Wireless ModesMaximize battery life at work via Bluetooth, or maximize after-work gaming time with seamless, low-latency performance Long Battery LifeBuilt for gaming and work, long lasting Bluetooth battery life uses AA lithium batteries Second Generation Mechanical Switches These switches have improved click durability and consistency, with new gold-plated contact points that resist degradation and last longer Advanced Optical Sensor - Improved sensor tracks your movement perfectly with zero rotation, enjoy responsive, pixel-accurate aiming. Runs on AA/AAA Batteries - Only one AA or AAA battery is needed to operate, this mouse features a hybrid battery slot optimally positioned for balanced weight distribution* Included with mouse