Display
5specsTypeAMOLED
Diagonal1.32 in
Resolution466 × 466 px · 320 ppi
Peak brightness2200 nits
ProtectionScratch/drop-proof glass
Processor & memory
1specMemory & storage
Card slotNo
Battery & charging
1specCapacity320 mAh
Connectivity
7specsUSBNo
Wi-FiNo
Bluetooth5.4, A2DP, LE
NFCYes (market/region dependent)
PositioningGPS · GLONASS · GALILEO · BDS · QZSS
RadioNo
NetworkNo cellular connectivity
Build & design
5specsDimensions41.2 × 41.2 × 9.5 mm
Weight32 g
Frame materialStainless Steel
SIMNo
ColorsBlackGreenWhiteGold
Software & updates
4specsOperating systemHyperOS 2
AnnouncedJun 26, 2025
ReleasedJun 26, 2025
AvailabilityAvailable
Audio
3specsAudioYes
LoudspeakerYes
Headphone jackNo
Raw specs (JSON)
{
"body": {
"sim": "No",
"weight": {
"grams": 32
},
"materials": {
"frame": "stainless_steel"
},
"dimensions": {
"depth_mm": 9.5,
"width_mm": 41.2,
"height_mm": 41.2
}
},
"misc": {
"colors": [
"Black",
"Green",
"White",
"Gold"
],
"model_numbers": [
"M2502W1"
]
},
"audio": {
"description": "Yes",
"loudspeaker": true,
"headphone_jack": false
},
"launch": {
"released_on": "2025-06-26",
"announced_on": "2025-06-26",
"availability": "available",
"date_precision": "day"
},
"memory": {
"variants": [],
"card_slot": false,
"storage_type": null
},
"battery": {
"capacity_mah": 320
},
"display": {
"panel_type": "AMOLED",
"protection": "Scratch/drop-proof glass",
"resolution": {
"ppi": 320,
"width_px": 466,
"height_px": 466
},
"size_inches": 1.32,
"peak_brightness_nits": 2200
},
"network": {
"speed": [],
"bands_2g": [
"N",
"A"
],
"bands_3g": [
"N",
"A"
],
"bands_4g": [
"N",
"A"
],
"bands_5g": [],
"speed_tier": 0,
"technologies": [
"No cellular connectivity"
],
"speed_highest": "None",
"speed_highest_label": "None"
},
"features": {
"sensors": [
"Accelerometer",
"gyro",
"compass",
"barometer",
"heart rate",
"SpO2",
"thermometer (skin temperature)"
]
},
"platform": {
"os": "HyperOS 2",
"cpu": null,
"gpu": null
},
"image_url": "https://fdn2.gsmarena.com/vv/bigpic/xiaomi-watch-s4-41mm.jpg",
"connectivity": {
"nfc": "Yes (market/region dependent)",
"usb": "No",
"wlan": "No",
"radio": false,
"bluetooth": "5.4, A2DP, LE",
"positioning": [
"GPS",
"GLONASS",
"GALILEO",
"BDS",
"QZSS"
]
}
}