M340 Collection plastic content: minimum 42% recycled plastic, excluding printed wiring assembly (PWA), receiver, and packaging. Click noise reduced by over 90% compared to Logitech M185. Left click and typing dBA level measured by an independent lab at 1 meter. Wireless range may vary due to environmental and computing conditions. Battery life may vary based on user and computing conditions. Requires an available USB port. M340 Mouse Nano Receiver 1 x AA Battery (pre-installed) User Documentation (IID) QSG On the pack