Key fact160 cm cm · 2.16 km/h km/h
Model specifications
Height160 cm cm
Max speed2.16 km/h km/h
Runtime pr chargeUp to 8 hours hours
Strength2.5 kg payload with arm extended; 4 kg with arm retracted kg
Weight46 kg operational; 33 kg with ballast removed for transport kg
3D LiDAR2 × hemispherical Hesai J128/JT128-class sensors
Arm dynamic speed70 cm/s
Arm extension55 cm
AvailabilityCommercially Available
Base portsHDMI, Ethernet, 3 × USB 3.2 Type-A
Base robot priceUSD 29,950
Base top speed60 cm/s / 2.16 km/h
Battery512 Wh LiFePO₄, quick-swappable, integrated BMS
Camera resolution2 × 2.3 MP global-shutter wide-FOV RGB cameras + 1 × 12 MP high-resolution RGB camera; wrist has a stereo depth camera
ColorWhite / light grey / black
ConnectivityWi-Fi, Ethernet, USB, HDMI
Control-loop rate100 Hz
CPUIntel Core Ultra 5 225H
CPU/GPUPrimary: Intel NUC 15, Intel Core Ultra 5 225H, 32 GiB RAM, 1 TB NVMe. Optional auxiliary AI compute: NVIDIA Jetson Orin NX, 16 GB RAM, 128 GB NVMe
Degrees of freedom, hands1 DOF for the standard gripper/tool axis
Degrees of freedom, overall9 DOF: 3-DOF omnidirectional base, 1 lift, 1 telescoping arm, 3-axis wrist, 1 end-of-arm tool axis.
Docking stationOptional, USD 1,495
Drive system3-wheel omnidirectional / holonomic
Extended warrantyUSD 2,495
Gear techLow gear-ratio drivetrain
Hazard sensing6 × PixArt laser-line sensor curtains
Head portsUSB 3.2 Type-A + Type-C
High-resolution RGB12 MP
IMU9-DOF
Ingress protectionIP20
Jetson Orin optionUSD 2,495
Jetson RAM16 GB
Jetson storage128 GB NVMe
Lift dynamic speed50 cm/s
Lift range120 cm
LLM integrationYes — supported at application level.
Main marketRobotics Research; Embodied AI; Assistive Robotics; Enterprise Robotics Development; Education; Human-Robot Interaction
ManufacturerHello Robot Inc.
Motor techElectric, low-gear-ratio/backdriveable joints
NationalityAmerican
Number of fingers2 on the standard Stretch compliant gripper
Official modelStretch 4
Operating humidity10–90% RH, non-condensing
Operating systemLinux/Ubuntu-based open-source stack with ROS 2
Operating temperature10–30°C
Optional AI computeNVIDIA Jetson Orin NX
Parallel gripperOptional, USD 1,495
Primary computeIntel NUC 15
Primary RAM32 GiB
Primary storage1 TB NVMe
Reach55 cm arm + 6 cm wrist
Robot type9-DOF omnidirectional mobile manipulator
RuntimeUp to 8 h
Safe with humansDesigned to operate around people
Self-collision monitoring100 Hz MuJoCo + URDF
Spare battery + ballastUSD 1,495
Speakerphone360° noise-reduction, 3 W stereo
Standard gripper aperture200 mm
Threshold clearanceUp to 20 mm
Tool interfaceQuick-release tool plate with 24 V Feetech RS485 bus
Total weight46 kg
Transport weight33 kg, ballast removed
Typical lead time2–4 weeks
Warranty12 months
Websitehttps://hello-robot.com/stretch-4/
Wide-FOV RGB2 × 2.3 MP global-shutter cameras
Wrist portUSB 2.0 Type-A
Wrist rotation310° yaw / pitch / roll
Wrist sensingLuxonis OAK-D SR stereo depth camera with 4 TOPS onboard processing
About the Stretch 4
9-DOF omnidirectional mobile manipulator with 8-hour runtime, dual 3D LiDAR, RGB/depth perception, ROS 2, open-source software, self-charging, and optional Jetson Orin AI compute.
Typical applications: Research & Development, Embodied AI Deployment.
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