Bluetooth 4. 0 & 2. 4G wireless Mode With Dual mode, Vic Tsing 2. 4G wireless/Bluetooth mouse is supported to connect two devices at the same time. One device connected by Bluetooth, another device connected through 2. 4G USB receiver. By pressing the dpi button for 3 seconds to switch the two mode freely, Blue light indicates Bluetooth connected, Red light indicates 2. 4G wireless mode connected. 5 adjustable DPI levels DPI levels (800/1200/1600/2000/2400 DPI) meet your needs Of different scenarios, office, games and others, more precise than the mouse with 3 DPI levels. 6 buttons design (left/right button, scroll wheel, DPI/mode switch button, forward/backward button) satisfy most people’s needs. Extensive compatibility Bluetooth 4. 0 mode works with Windows 8/window 10/Android/Mac OS system(Not with Win7/XP), easy to pair and connect. 2. 4G wireless mode works with any device that has USB interface, Plug the USB Receiver then it will connect. The USB Receiver stored in the battery compartment of the cordless mouse. Each mode has a reception distance of 33feet/10 meters, beyond This distance The connection will lost. Ergonomic & durable design ergonomic Optical Bluetooth wireless mouse with larger soft rubber finger rest area minimizes hand-fatigue. Frosted surface makes it sweat proof & anti-slip. Tested over 5 million times keystroke lifespan ensures a long-term and stable use. 4. 2x2. 5x1. 7inch Size suitable for most Palms, Offering a comfortable grip. Longer battery life this Bluetooth mouse for laptop will be in sleep mode in 10 minutes of inactivity to save battery, press any button to wake it up. Powered by a 1XAA 1. 5V battery, which not included in the package, The battery life can lasts up to 12 months. ▲18 Months - During this period, we will provide free replacement for any quality problems.