Large Display - 12-digit LCD display Battery Operation - LR1130 batter is included 3-Key Memory - includes memory plus, memory minus, and recall/clear memory keys Small and portable, long battery life, non-slip base, comfortable touch, smart sleep Small and light design, exquisite and cute, easy to carry, 15mm thickness Long battery life, no longer worry about insufficient power (with two button batteries, normal use, power can be used for about 2 years) The 12-digit screen is clearly displayed, and the reading is quick and easy Round buttons, comfortable buttons, easy operation Button noise reduction technology, refuse to interfere with learning ideas Intelligent power saving and automatic sleep, any key to wake up, bring long-lasting battery life Additional Features - Includes percent key, square root key, and automatic power off Non-slip design: Non-slip washers are not easy to slide during operation. Durable silicone button: good sense of touch, ABS plastic material, Light weight. Reasonable configuration and comfortable operation. 100% AFTER SALE SEVICE:We provide a return policy for you to ensure you 100% satisfaction. Would you have any questions to our product, please feel free to contact us and we will give you a quick response.