1. [Plug and play] No installation driver, USB compatible with USB 1.0/2.0/3.0, plug and play, convenient and fast. 2. [Long Range] When charging, the red light is on and the full charge green light is on. It can be used for about three months on a single charge. 3. [Digital display power] LED high-definition digital display screen, digital display power, know the power anytime, anywhere, and charge at any time. 4. [Adsorption Storage] The receiver can be attached to the bottom for easy storage and retrieval, without fear of losing the receiver. 5. [Widely applicable] Speech teaching/company meetings/training speeches/etc Remote control distance: ≤ 200M Battery capacity: 200MAH Working voltage: 3.7V Colour:black Material:ABS Package Contents: 1 * B7 Presentation Clickers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.