1Adopts 2.4G wireless technology with built& 8209;in laser head, multi& 8209;function buttons supports PPT page turning function, gravity sensor and RF wireless technology combined to achieve the perfect combination of mouse and presentation functions. 2Built& 8209;in USB interface is plug and play to keep simple operation, easy to use with laser indication function, which is worth having. 3Ergonomic design helps wireless presenter with comfortable feel, smooth and durable. 4With the most advanced RF radio frequency technology, micro& 8209;power transmission, there is harmless to the human body, which can be environmentally friendly, healthy, environmental protection and power saving. 5Supports 6& 8209;shaft gyro technology gravity sensor positioning with mouse function for USB receiving.Item Type: Wireless presenter Product Size: Approx. 14 x 2.3 x 2cm / 5.5 x 0.9 x 0.8in Product Net Weight: Approx. 28.5 g / 1 oz Product Material: ABS Color: Black / White (optional) Product Model: PR28 Built-in Battery: Polymer lithium battery (200mAh) Carrier Frequency: 2.402GHz-2.483GHz Number of Keys: 8 Effective Distance: Within 10-15 meters Power Supply: 3.7V Working Current: 1 x Wireless Presenter1 x USB Receiver1 x User Manual1 x Charging Cable