GALAKU Undertow Sucking & Vibrating Male Masturbator App Controlled

The GALAKU Undertow is an app-controlled male masturbator that combines sucking, vibration, and heating in one device. Its integrated design uses a flexible suction system, a vibrating inner channel, and built-in heating to provide multiple types of stimulation through a single male pleasure toy.

Sucking and Vibration in One Device

Undertow combines 10 suction settings with 10 vibration settings, allowing the two stimulation functions to work together for a more varied experience. A built-in high-power pump rapidly changes the air pressure inside the device to create adjustable suction, while the vibration system adds rhythmic stimulation through the internal channel.

Flexible Internal Channel

The internal channel features four different structural areas designed to create changing sensations as the device is used. The channel includes 10.5 mm progressive sections, a 13.5 mm spiral section, 5.5 mm textured sections, and an 18 mm simulated vacuum chamber. These different internal structures create changes in pressure and contact throughout the experience.

App Control and Adjustable Stimulation

The smart control system allows the device to be operated through a compatible smartphone app. Three adjustable levels are available for the combined suction and vibration modes, giving users control over the stimulation intensity from their phone.

Integrated Heating

The built-in heating function adds warmth during use, creating a more comfortable temperature alongside the suction and vibration functions.

Designed for Easier Cleaning

The device uses a detachable design for cleaning. The inner sleeve can be removed directly and turned inside out, allowing both the inside and outside surfaces to be rinsed more easily. The construction uses ABS and silicone, with no plastic ring around the silicone inner sleeve.

How to Use It

Undertow is designed for solo use. Insert the appropriate amount of water-based lubricant into the internal channel, select the desired suction, vibration, and heating settings, then adjust the stimulation through the compatible app. After use, remove the inner sleeve and rinse the washable surfaces thoroughly before allowing them to dry completely.

Who It Is For

Undertow is suitable for beginners who want multiple stimulation functions in one male masturbator, as well as experienced users who prefer adjustable suction and vibration. It can also suit users who want smartphone-based control and a rechargeable design for more convenient operation.

What It Feels Like

The suction creates an air-pressure-based sensation that can range from lighter stimulation to stronger pressure, while the vibration adds rhythmic and pulsating sensations through the internal channel. The flexible inner structure provides changing contact as different sections of the channel are engaged. Integrated heating adds warmth to the overall experience, while the device operates at a rated noise level of up to 60 dB.