[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Emulation](./puppeteer.protocol.emulation.md) > [SetVirtualTimePolicyResponse](./puppeteer.protocol.emulation.setvirtualtimepolicyresponse.md) > [virtualTimeTicksBase](./puppeteer.protocol.emulation.setvirtualtimepolicyresponse.virtualtimeticksbase.md) ## Protocol.Emulation.SetVirtualTimePolicyResponse.virtualTimeTicksBase property Absolute timestamp at which virtual time was first enabled (up time in milliseconds). Signature: ```typescript virtualTimeTicksBase: number; ```