I opened item just to test that it works vintage item comes with 1 new AA Duracell battery Nano-receiver plug it in once and forget about it to small it stays in your USB port so you won't lose it. Ergonomically designed Natural shape and nonslip rubber side grips Connect without a cord robust, rellabile- 2.4 GHz cordless technology, with virtually no delays or dropouts One battery, months of use Battery indicator light and on/off switch Package contents Nano receiver 1 AA battery User documentation Made in China
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