RYRA Pebble Mouse M350 Bluetooth Battery Dual Mode Wireless Mouse Mute Mice Office Mouse For Laptop Accessories Number of keys: 3 (keys) Interface: USB Wireless transmission frequency: 2.4GHz Does ergonomics support: support Adjustable resolution: 3rd gear and below Operating distance: 10(m) Specifications: Warm shape and comfortable hand feeling Fashion, light and lovely Interpret energy in silence. Fashion appearance can show personality, but also exquisite and light. Jingshan Jingmei's familiar key feel interprets energy with quiet Multi-link, Bluetooth and 2.4G receiver easy link Easy to adapt to a variety of scenes, coffee table, bed can provide comfortable experience Installing the battery is convenient and quick to use. Package Included: 1 x Mouse, 1 x Receiver Notes: The battery needs to be purchased by the customer.