# BC127 Max data rate in SPP mode **URL:** \ **Category:** WiFi and Bluetooth Modules\ **Created:** [March 16, 2018, 12:47am UTC](https://forum.sierrawireless.com/t/bc127-max-data-rate-in-spp-mode/12225 "2018-03-16T00:47:38Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![dmclane14](https://avatars.discourse-cdn.com/v4/letter/d/e0b2c6/32.png) [@dmclane14](https://forum.sierrawireless.com/u/dmclane14)\ **Post date:** [March 16, 2018, 12:47am UTC](https://forum.sierrawireless.com/t/bc127-max-data-rate-in-spp-mode/12225/1 "2018-03-16T00:47:38Z")
We are using SPP for a file transfer in data mode. We currently achieve about 100kbps throughput rate using ~5MB files. We were expecting to achieve \>500kbps, and the BC127 data sheet claimed 700 kbps. We are wondering if and how anyone has achieved these higher rates. ---
**Author:** ![mlw](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/mlw/32/3706_2.png) [@mlw](https://forum.sierrawireless.com/u/mlw)\ **Post date:** [March 16, 2018, 3:03pm UTC](https://forum.sierrawireless.com/t/bc127-max-data-rate-in-spp-mode/12225/2 "2018-03-16T15:03:33Z")
Hi, Generically speaking BT is not great for file transfers, I have never really been able to achieve a high data rate when sending files/data over the link either with the BC127 or for instance my smart phone to a PC performing a file transfer so I think from experience this is more a tech limitation than a unit one. Regards Matt ---
**Author:** ![SW-Ad](https://avatars.discourse-cdn.com/v4/letter/s/e495f1/32.png) [@SW-Ad](https://forum.sierrawireless.com/u/SW-Ad)\ **Post date:** [June 25, 2018, 2:34pm UTC](https://forum.sierrawireless.com/t/bc127-max-data-rate-in-spp-mode/12225/3 "2018-06-25T14:34:00Z")
You can achieve higher throughput rate (\>500kbps) when the High Speed feature is enabled (see HIGH\_SPEED config). Note that when High Speed is enabled, the audio is disabled.