The output current of the USB power adapter you are using may be insufficient. Check the power output of the power adapter you are using. We strongly recommend using a power adapter with an output current of 2A or higher.

There are various possible causes for interruptions and noise in the Bluetooth connection. Try the methods below. ■ Turn off and on the Bluetooth device. The connection may be stabilized by restarting the Bluetooth device and connecting again. ■ Move the Bluetooth device closer Depending on the type of Bluetooth device and the type of codec connected, connectivity may be poor due to the distance and position between the devices. Try shortening the distance between the connected devices or changing the position so that there are no obstructions between the devices. ■Keep away from devices that generate radio waves If wireless products other than the connected devices are nearby, the radio waves of other products may interfere with the connection, resulting in interruptions or noise. Keep away from other wireless products. ■BluetoothCheck codec There are some Bluetooth codecs that allow you to select settings that prioritize connectivity (less disconnection) or settings that prioritize sound quality (easier to disconnect). increase. Check what connection codec you are using and what your connection settings are, then select the codec and settings that suit your environment.

Usually, you can use multiple devices as "connected devices" on the host side (smartphone or DAP), but there is a possibility that the past connected devices are blocking new connections due to some problem. increase. It may be solved by deleting the "connected devices" of the device that has been connected in the past.

There is a limit to the output current of the Lightning terminal, and it may not be possible to use it if the power consumption of the connected device is large. In that case, you may be able to connect by using Apple's "Lightning - USB Camera Adapter" or "Lightning - USB 3 Camera Adapter".

You can bring the repaired item to the store where you purchased it, or you can send it directly to Iida Piano After Service Co., Ltd. For details on the repair process, see Repair Service Please visit our web page.

Update your firmware and try again. Here are the steps: 1. Download the firmware at https://www.hidizs.net/pages/download-center. 2. Copy the AP80 upgrade file "update.upt" to the root directory of the TF card, please use FAT32 format. 3. Insert the TF card into AP80. "System Settings" - "Firmware Update" - "Firmware Update?" Note: Make sure the battery is above 50% during the update.

Follow the steps below. 1. Unzip the zip file on your PC and copy the AP80 upgrade file "update.upt" to the root directory of the TF card, format is FAT32. 2.Insert the TF card into the AP80. With the player turned off, press the power button on the right side of the AP80 and the button below the power button at the same time. 3.When the player shows the upgrade interface, please release the button and restart the device after the update is completed.

The operation procedure is as follows. 1. Download V2.0 firmware at https://www.hidizs.net/pages/download-center. 2. Copy the AP80 upgrade file "update.upt" to the root directory of the TF card, the format is FAT32 3. Insert the TF card into AP80. "System Settings" - "Firmware Update" - "Firmware Update?" Note: Make sure the battery is above 50% while downgrading.

Please charge the device first. After sufficient charging, pressing and holding the power button for 10 seconds or longer may force the unit to reset and turn on.