m3 plus m4 m4pro smart bracelet heart rate blood pressure tracker ip67 waterproof bluetooth wristband
Description
specifications: model: m 4 bt version: 4.0 color: black, red, blue (optional) waterproof class: ip67 compatible system: android 5.0 above, ios 9.0 above battery capacity: 90mah lithium battery screen size: 0.96tft standby time: about 10 days working time: about 7 days package size: 12.9 * 7.5 * 2.9cm / 5.08 * 2.95 * 1.14in package weight: 40.7g / 1.44oz
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