Built-in Backup Battery Lithium-ion Battery 3.7V / 280mA, Code SC 2262 IC, Alarm Both Voice Prompts and Quick Flash Strobe, One-Key-Control Function, Power Output DC5V 1000mA, Temperature -20℃ ~ +55℃, Humidity 40% ~ 80%RH, Remote Control to Arm / Disarm / Emergency Alarm, Learning/Storage Location Support up to 20 learning / Storage Location for Wireless Defense Zones, Function Can work as a Standalone Alarm Host or Wireless Siren, Color Blue & White, Size 8cmx 3.1cm / 3.15″x 1.22″, Detectors and 5 Wireless Remote Controllers, Standby Current ≤ 13mA, Wireless Frequency 433MHz, Alarm Current ≤ 230mA, Wireless Learning Code, Decibel >100dB.
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There is only one database record (it was for $12.99), so you can’t see price history chart. You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).
One-Key-Control Function, Power Output DC5V 1000mA, Wireless Learning Code, Function Can work as a Standalone Alarm Host or Wireless Siren, Decibel >100dB, Size 8cmx 3.1cm / 3.15″x 1.22″, Humidity 40% ~ 80%RH, Color Blue & White, Wireless Frequency 433MHz, Alarm Current ≤ 230mA, Remote Control to Arm / Disarm / Emergency Alarm, Built-in Backup Battery Lithium-ion Battery 3.7V / 280mA, Standby Current ≤ 13mA, Detectors and 5 Wireless Remote Controllers, Alarm Both Voice Prompts and Quick Flash Strobe, Learning/Storage Location Support up to 20 learning / Storage Location for Wireless Defense Zones, Temperature -20℃ ~ +55℃, Code SC 2262 IC.
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Price history (for all/most countries) for Digoo DG-ROSA 433MHz Alarm [EU] is here. The lowest price was: $12.99.
Price records source(s): Banggood Click on image to enlarge. You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).