Compatible Devices: A universal wristband that fits e-readers and tablets with screen sizes of 4-8 inches, whether they have a protective case; the wristband uses a stretchable silicone band to securely attach to the device. Comfortable All-Day Bedside Reading: This wristband is designed for comfortable bedside reading, made of skin-friendly silicone to effectively reduce hand fatigue. It meets the needs for long reading sessions, whether you're commuting or relaxing at home. Soft Silicone Material: The wristband is made of elastic silicone, soft, durable, and comfortable to wear, whether you're reading in bed or traveling. It remains comfortable even during long reading sessions. Hands-Free: This wristband allows for easy one-handed operation of e-readers/tablets, preventing accidental drops. The all-silicone wristband stretches easily and fits all 4-8 inch devices. Easy Installation: It stretches on in just seconds; simply wrap it around your wrist, adjust the tension, and enjoy the convenience of one-handed reading.