Warm NOTE: Christmas is coming and we will include a Christmas card that you can give to your friends or family as a Christmas giftBy the way: Merry Christmas Upgraded Ultrasonic Pest Repeller: Stimulate the nervous system of pests with 60 segments/second of changing ultrasonic waves, making them extremely uncomfortable and unable to adapt. Combined with an ultra-wide frequency range, repelling more type of pests and rodants effectively. 2-In-1 Enhanced Pest Control: Material: ABS, Size: 92 * 68 * 31mm, voltage 110-230v, frequency 25-50kHZ, 100 square meters area coverage Suitable for: mosquitoes, flies, mice, cockroaches, bed bugs, etc, can more effectively repel mouse, rodents, mosquitoes, flies, beetles, cockroaches, moths, ants, bedbugs, rodents, fleas, ants, spiders, bugs and insects, etc. Ultra-Large Effective Area: Powerful ultrasonic wave enabled by newest 3D surround dual speakers. With unique expanded sound channel, ultrasonic waves can better spread in all directions, leaving nowhere for pests and rodents to hide. Human & Pet Friendly: Mice repellent for house use ultrasonic waves that are completely safe for humans and pets, easy to use, and plug directly in to effectively repel pests without any harm.