【Light Ring Adjustment】Easily press the dimmer button to change the light color: warm light, cool light, and natural light; hold the button to switch the brightness from 1% to 100%. Meets all your needs in different circumstances. Press the button twice in a row to display the SOS flash. 【USB Charging】Built-in 200mAh polymer lithium battery. Battery life: 60 minutes in single light mode, 30 minutes in dual light mode (strongest mode). The battery with a USB cable (included) does not require frequent purchase and replacement of disposable batteries. 【Multifunctional Selfie Light】This ring light helps illuminate your face and enhance ambient lighting for the perfect selfie. If you find yourself in a dark environment, it can be used as an emergency light to illuminate the area. 【Portable and Easy to Use】Product size: 9 x 9 x 3.1 cm, the LED rings do not take up too much space in your pocket. Simply clip it onto the top of your smartphone or tablet to capture high-quality photos and videos for every important moment in your life! 【Compatible with All Smartphones】 The allowable terminal thickness opening range is 0 to 15mm. It works for most phones and tablets. Such as iPhone XR/iPhone XS/iPhone 8/8 Plus/Sony/Huawei and other mobile phones, iPad, and even MacBook. Brightness Adjustment: - Lightly press the button to change the light color. - Long press the button to easily adjust the brightness. - Double-click for SOS flash. Specifications: Material: ABS+PC Size: 9*9*3.1cm LED Quantity: 20 pcs White LEDs + 20 pcs Warm LEDs Light Color: Warm light, Cool light, and Natural light Battery Capacity: 200mAh Charging Voltage: 5V/1A Maximum Clamping Thickness: 0.59 inches Color Temperature: 3200K-5600K Note: Turn off the power after full charge (although there is overcharge protection, it is still recommended to turn off the power after charging). Applicable: Most digital devices (not covered) up to 0.59 inches thick. Charge the selfie ring before using it for the first time. If you do not use the selfie light frequently. To protect the built-in battery, please charge it once a month.