Leaven @ Altrason was established in Taipei, Taiwan on September 15, 1984. Since 1984, we have been engaged in developing and manufacturing ultrasonic pest control device, animal repeller, mole repellers, bird repeller, rodent repellent, insect repeller, mosquito repeller, snake repeller, air purifiers and general electronic products. Leaven’s pest control products are designed and made for effectiveness, power efficiency and environmental friendly for better pest free and chemical-free living environments. Accumulating years of experience, we can provide you with good quality products, punctual delivery and reasonable prices to meet your market demands. All of our products are of C ... more