EH0490B Features Smart and portable size Wireless(RF 2.4G) connection 2.4GHZ DSSS radio transceiver， 30M/100 feet max distance Allows you to enjoy PC multi-media entertainment at home Works with Android box ， smart TV， etc. Allows you to lie on a sofa playing computer games Convenient and efficient for conference， presentation and lecturing Allows you to share large TV and projector screen Built-in rechargeable lithium-ion battery  General Specs Brand & Model  FEME F10 Deluxe Range Within 10 meters Auto sleep time 2 minutes Standby time More than 200 days Gyroscope Six axis of gyroscope Dimension 167 x 48 x 18mm Weight About 160g / 0.35 poud Package Details Weight: 156.22 g Size: 17.5*5.5*3.5 cm