Use this adapter to make your installation of a 4 channel amplifier to the factory system faster with a cleaner install. Use this plug and play adapter so you don't have to cut or splice into the factory wiring. Provides 2 pair stereo RCA output and a power wire for the remote amplifier turn on connection. Adjustable 4 channel gain output. Retains fader and balance. Connection is done at back of radio. Bare speaker wires on this adapter to connect factory speakers to the new amp. VERY IMPORTANT----PLEASE READ BEFORE PURCHASE---- Not compatible with factory amplified stereo systems. Only works with factory non-amplified systems (no JBL/Synthesis, etc.) Connecting this adapter to the factory wiring will disconnect the vehicle speakers from the radio- requiredsadding amp for speakers to work. Connecting this adapter to the factory wiring will disconnect the vehicle speakers from the radio- required adding amp for speakers to work. Quick disconnect is to connect speaker wires to run to the new amp- only the speaker wires are connected to the factory speakers- all other wires aren't used. Easy to put back to stock. Just remove this adapter and it goes back to stock system. Adapter shrink tubed for durability. Compatible vehicles: No external factory amplifier vehicles only: Made for Toyota: 2020-2023 4Runner, 2019-2020 Avalon, 2019-2022 C-HR, 2018-2020 Camry, 2020-2023 Corolla, 2019-2020 RAV4, 2020-2022 Sequoia, 2018-2020 Sienna, 2020-2023 Tacoma, 2020-2023 Tundra Use this adapter to make your installation of a 4 channel amplifier to the factory system faster with a cleaner install. Use this plug and play adapter so you don't have to cut or splice into the factory wiring. Provides 2 pair stereo RCA output and a power wire for the remote amplifier turn on connection. Adjustable 4 channel gain output. Retains fader and balance. Connection is done at back of radio. Bare speaker wires on this adapter to connect factory speakers to the new amp. VERY IMPORTANT----PLEASE READ BEFORE PURCHASE---- Not compatible with factory amplified stereo systems. Only works with factory non-amplified systems (no JBL/Synthesis, etc.) Connecting this adapter to the factory wiring will disconnect the vehicle speakers from the radio- required adding amp for speakers to work. Compatible vehicles: No external factory amplifier vehicles only: Made for Toyota: 2020-2023 4Runner, 2019-2020 Avalon, 2019-2022 C-HR, 2018-2020 Camry, 2020-2023 Corolla, 2019-2020 RAV4, 2020-2022 Sequoia, 2018-2020 Sienna, 2020-2023 Tacoma, 2020-2023 Tundra