TeckNet TruWave technology: Provides precise, smart cursor control over many surface types. TeckNet CoLink technology: After pairing there’s no need to re-establish pairing after a signal loss or shutdown. TeckNet 2.4G Wireless Gaming Technology: Experience zero delay between your thoughts and actions with gaming-grade 2.4GHz wireless, an increased working distance of up to 50ft/15m 18-Month Long Battery Life: Go longer between battery changes thanks to TeckNet 4-Level energy efficient engineering. With Auto power-off function, On/Off switch, Smart sleep mode and battery life indicator, you might just forget this mouse runs on batteries Ultra-Durable Build (5-million-click): TeckNet M002 Classic is built to handle torturous conditions thanks to primary TeckNet M-switches rated to a 5-million-click lifespan Features a battery level indicator: Never be surprised by low battery power again. The LED battery indicator warns you if the charge is running low.