With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cd11IfErpOfdmTxPowerEntry
Cisco DOT11 Interfaces Erp Ofdm Tx Power Entry
1.3.6.1.4.1.9.9.272.1.1.2.14.1
Each entry specifies the number of available transmit power levels, the values of all the levels, and the configured transmit power level for an IEEE 802.11g radio interface.
Back to CISCO-DOT11-IF-MIB MIB page.
IPHost Network monitor allows you to monitor cd11IfErpOfdmTxPowerEntry on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.