With high sensitivity, you can play the game quickly, steadily and continuously for a long time with no delay. Having light weight and compact size, it is easy to carry. Featuring low power consumption, extraordinary hand feeling and good heat dissipation effect, it is durable and practical to use. Made of high-quality ABS material, the gaming trigger is durable, reliable and wear-resistant for long-time use. There are 2 different sizes and styles for you to choose from A and B, and you can choose one according to your personal needs. It is suitable for most smart phones. With extraordinary hand feeling, it will let you enjoy the pleasure of the game playing. Item Name: Game Controller Material: ABS Working Current: Less than or Equal to 7mA Battery Capacity: Built-in Rechargeable 45mAh Battery (Included) Support Operating System: for iOS, for Android Stand-by Current: Less than or Equal to 2uA Suitable Mobile Phone Thickness: 6.5-9.5mm Pulse Gears: 4 Gears Link Mode: Physical Buckle Size Details: A: 4.8cm x 2cm x 3cm/1.89" x 0.79" x 1.18" (Approx.) B: 6.5cm x 3.2cm x 3.8cm/2.56" x 1.26" x 1.5" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: A: 1 Pair of Left Right Pulse Buttons 1 x USB Cable 1 x User Manual B: 1 Pair of Left Right Pulse Buttons 1 x USB Cable 1 x Cooling Fan 1 x User Manual