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WiWU SW01 Ultra Max Wireless Bluetooth Smart Watch for Phone Big-Size ScreenThis smartwatch chip is SF32LB551. Bluetooth is V5.0+3.0 and the Material is Aluminum alloy+ IML. SW01 Ultra Max Smartwatch is also Waterproof IPX 68. This Smartwatch has big size display. The display size is 2.2 inches and the pixel is 458*518. The battery is 400mAh, 3.7V. charging time 2.5H, Working time 10 days, standby time 150 days...