哪款纯音频婴儿监视器电池续航时间最长？

The Hatch Rest+ is a multi-function sleep device combining a customizable color nightlight, multiple white-noise and lullaby sounds, and a built-in two-way audio monitor controllable via the Hatch Sleep app. It supports app scheduling, Alexa integration, Wi‑Fi audio monitoring, and includes a short-duration backup battery for portability and power outages.

The HelloBaby HB6550 is a 2.4 GHz dedicated video baby monitor with a 5 in parent display, remote pan/tilt/zoom, two-way talk, temperature alerts, and infrared night vision. It offers long transmission range and a rechargeable parent unit with sound-activated ECO mode, suited for parents wanting a non-WiFi, easy plug-and-play monitor.

A DECT audio baby monitor (models SCD720/86 and SCD730/86) providing a private, interference-free DECT connection, Smart ECO mode, up to 50m indoor/330m outdoor range, rechargeable parent unit (up to 18 hours) and features like night light, lullabies, temperature sensor and two-way talk. Suits parents who want reliable audio monitoring with long parent-unit battery life and clear sound.

The VTech DM112-2 is a DECT 6.0 digital audio baby monitor offering clear, encrypted audio and sound-level LEDs on the parent unit. It provides up to 1,000 feet of range and can operate the parent unit on batteries for portable use, making it a simple reliable choice for parents who want basic audio monitoring without Wi‑Fi.