Key Specifications
| Features | Specifications |
| Model | B400 |
| Battery | CR2032 |
| No connection standby | 560 days |
| Connected standby | 180 days |
| Operating Voltage | DC-3V |
| Stand-by current | <40μA |
| Alarm current | <12mA |
| Low battery detection | Yes |
| Bluetooth frequency band | 2.4G |
| Bluetooth distance | 40 meters |
| Operating temperature | -10℃ - 70℃ |
| Product shell material | ABS |
| Product size | 35358.3mm |
| Product Weight | 10g |
Function Introduction
Find your Items：Press the “Find” button in App to ring your device, you can follow the sound to find it.
Location Records：Our app will record the latest “disconnected location” automatically, tap“locationrecord” to view the location information.
Anti-Lost：Both your phone and the device will make a sound when they disconnected.
Find your Phone：Press the button twice on the device to ring your phone.
Ringtone and Volume Setting：Tap “Ringtone settings” to set the phone ringtone.Tap“Volume setting”to set the ringtone volume.
Super long standby time：The anti-lost device uses a battery CR2032 battery, which can stand by for 560 days when it is not connected, and can stand by for 180 days when it is connected.
Key Features
Find Keys, Bags & More：Directly attach the powerful key finder to keys, backpacks, purses or anything else you need to keep track of regularly and use our TUYA APP to find them.
Find Nearby：Use the TUYA app to ring your key finder when it’s within 131 ft. or ask your Smart Home device to find it for you.
Find Far Away：When outside of Bluetooth range, use the TUYA app to view your key finder’s most recent location or enlist the secure and anonymous help of the TUYA Network to aid in your search.
Find Your Phone：Use your key finder to find your phone, even when it’s on silent.
Long Lasting & Replaceable Battery：Up to 1 year replaceable battery CR2032,remind you to replace it when in low power;Exquisite battery cover design to avoid children open it easily.
Packing list
1 x Heaven and earth box
1 x User manual
1 x CR2032 type batteries
1 x Key finder
Outer box information
Package size: 10.4*10.4*1.9cm
Qty:153pcs/ctn
Size：39.5*34*32.5cm
G.W: 8.5kg/ctn
The effective distance is determined by the environment. In empty environment (Not obstructed place), it can reach a maximum of 40 meters. In office or home, there are walls or other barriers. The distance will be shorter, about 10-20 meters.
Android supports 4 to 6 devices according to different brands.
iOS supports 12 devices.
The battery is a CR2032 battery button.
One battery can work for about 6 months.
