30 Musics Home Doorbell Strong Signal SOS Button Doorbell Low Power Consumption Cordle USB Doorbell for Elderly Emergency CallFeature:1. High performance:Smart USB Doorbell has ultra-low power consumption, long service life, and a working temperature range of - 20-70 , which can withstand various adverse weather conditions.2. Modern and Practical Design:Our Wirele Doorbell has a fashionable appearance and practical functions. Lightweight and sensitive, it can be remotely controlled, providing you with quick instructions to ensure that you hear the bell and open the door in a timely manner.3. 30 song Ringtones:SOS Button Doorbell has 30 song ringtones to choose from, and you can choose your favorite music.4. Easy to Install:The Mini Door Bell is easy to install and can be installed in just a few minutes. The receiver can be placed with screws.5. Precautions:In environments with high wirele interference, the transmiion distance of the Wirele Doorbell Receiver may be reduced. If no music sounds, check whether the horn wiring is disconnected.Specification:Certification: NONEOrigin: Mainland ChinaConnection Type: WireleDoorbell receiverProduct name: Wirele doorbell receiverModel: AK-C220616Music quantity: 30 piecesOutput mode; hornDemodulation method: ASKShell material: ABSControl method: equipped with remote controlProduct size: 56.5 * 33 * 5.3mm/2.2*1.2*0.2in(excluding housing)Product weight: 8g (without housing, including speaker)Working voltage: DC5V/1AStandby current: 4.6mAWorking current: 120mAReceiving sensitivity: - 105dBWorking temperature: - 20-70 Single button remote controlProduct Name: Single Button Remote ControlModel: SOS-V2.0Operating frequency: 433.92MHzBattery type: button battery 2016 * 3Modulation mode: ASKEncoding format: EV1527Shell material: ABSProduct size: 45 * 45 * 14mm/1.7*1.7*0.5in (including housing)Net weight of product: 11g (including shell and battery)Working voltage: DC9VQuiescent current: 0.1uAEmiion current: 20mATransmiion power:+10-13dBmWorking temperature: - 20-70 Note:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2cm measuring deviation due to manual measurement.Packages:1 x Wirele Doorbell Receiver1 x Single Button Remote Control 1. There is no limited stock to fulfill the orders on a daily basis.2. For USA/CA /RU the